2020-10-28T12:20:30Zhttp://edoc.mpg.de/ac_p_oai.ploai:edoc.mpg.de:72572006-10-1629:895
Crystal structure of monocesiumaurate(I), CsAuO
Mudring, A.-V.
Jansen, M.
AuCsO, tetragonal, 14/mmm (No. 139), a = 10.1646(4) Angstrom, c
= 6.1773(4) Angstrom, V = 638.2 Angstrom(3), Z = 8, R(P) =
0.082, wR(P) = 0. 111, R(I) = 0.048, T = 293 K.
2001
Article
http://edoc.mpg.de/7257
urn:ISSN:1433-7266
Zeitschrift für Kristallographie: New Crystal Structures, v.216, 481-481 (2001)
en
oai:edoc.mpg.de:72582006-10-1629:895
Crystal structure of monorubidiumaurate(I), RbAuO
Mudring, A.-V.
Jansen, M.
AuORb, tetragonal, 14/mmm (No. 139). a = 9.937(l) c = 5.8193(9)
Angstrom, V = 574.6 Angstrom(3), Z = 8. R(P) = 0.062, wR(P) =
0.083, R(1) = 0.033, T = 293 K.
2001
Article
http://edoc.mpg.de/7258
urn:ISSN:1433-7266
Zeitschrift für Kristallographie: New Crystal Structures, v.216, 482-482 (2001)
en
oai:edoc.mpg.de:72592006-10-1629:895
Crystal structure of tetrarubidium dichloride monooxide, Rb4(Cl2O)
Mudring, A.-V.
Jansen, M.
Cl2ORb4, cubic, 1 (4) over bar 3d (No. 220), a = 9.521(3)
Angstrom, V = 863.1 Angstrom(3), Z = 4, R-gt(F) = 0.077,
wR(rcf)(F-2) = 0.155, T = 293 K.
2001
Article
http://edoc.mpg.de/7259
urn:ISSN:1433-7266
Zeitschrift für Kristallographie: New Crystal Structures, v.216, 483-483 (2001)
en
oai:edoc.mpg.de:72602006-10-1629:895
Crystal structure of galotrilanthanum triiodide, La3GaI3
Zheng, C.
Mattausch, Hj.
Simon, A.
GaI3La3, cubic. 14(1)32 (No. 214), a = 12.666(2) Angstrom, V =
2032.0 Angstrom(3), Z = 8, R-gt(F) = 0.068, wR(ref) (F-2) =
0.131, T = 293 K.
2001
Article
http://edoc.mpg.de/7260
urn:ISSN:1433-7266
Zeitschrift für Kristallographie: New Crystal Structures, v.216, 495-496 (2001)
en
oai:edoc.mpg.de:72612006-10-1629:895
Refinement of the crystal structure of lanthanum digallide, LaGa2
Zheng, C.
Mattausch, Hj.
Simon, A.
Ga2La, hexagonal, P6/mmm (No. 19 1), a = 4.3092(6). Angstrom c
= 4.4251(9) Angstrom. V = 71.2 Angstrom(3), Z = 1, R-gt(F) =
0.0 19, wR(ref)(F-2) = 0.044, T = 293 K.
2001
Article
http://edoc.mpg.de/7261
urn:ISSN:1433-7266
Zeitschrift für Kristallographie: New Crystal Structures, v.216, 497-497 (2001)
en
oai:edoc.mpg.de:74022006-10-1629:895
Anomalous spectral shifts of indirect excitons in coupled GaAs quantum wells
Snoke, D. W.
Negoita, V.
Hackworth, D.
Eberl, K.
We have studied the energy shifts of Indirect excitons
consisting of an electron in one quantum well and a hole in an
adjacent quantum well. Several surprising effects occur: (1) a
very strong blue shift with increasing intensity of resonant
laser excitation, (2) a very strong red shift with weak
magnetic field, and (3) very low-frequency (sub-Hz)
fluctuations of the spectral position at high excitation
density. We discuss the effect of screening by carriers excited
in the substrate material.
2001
Article
http://edoc.mpg.de/7402
urn:ISSN:0217-9792
International Journal of Modern Physics B, v.15, 3606-3610 (2001)
en
oai:edoc.mpg.de:74112006-10-1629:895
Zinc diffusion enhanced Ga diffusion in GaAs isotope heterostructures
Bracht, H.
Norseng, M. S.
Haller, E. E.
Eberl, K.
gallium arsenide isotope structure; gallium self-diffusion;
zinc diffusion; zinc-induced interdiffusion
We have investigated the simultaneous diffusion of Zn and Ga in
a (69)GaAS/(GaAs)-Ga-71 isotope multilayer structure at
temperatures between 618degreesC and 714degreesC. Diffusion
profiles of Zn, Ga-69, and Ga-71 were measured with secondary
ion mass spectrometry. Accurate modeling of the simultaneous
diffusion of Zn and Ga is achieved on the basis of a Ga vacancy
and Ga interstitial controlled mode of Zn diffusion. This
result is at variance with the generally accepted model of Zn
diffusion via Ga self-interstitials. We discuss the
consequences of our approach against the background of Zn and
Cd diffusion experiments performed earlier. (C) 2001 Elsevier
Science B.V. All rights reserved.
2001
Article
http://edoc.mpg.de/7411
urn:ISSN:0921-4526
Physica B, v.308, 831-834 (2001)
en
oai:edoc.mpg.de:74192006-10-1629:895
The effect of the oxygen exchange at electrodes on the high-voltage electrocoloration of Fe-doped SrTiO3 single crystals: A combined SIMS and microelectrode impedance study
Rodewald, S.
Sakai, N.
Yamaji, K.
Yokokawa, H.
Fleig, J.
Maier, J.
strontium titanate; electrocoloration; impedance spectroscopy;
SIMS; oxygen exchange
The effect of the electrode material on the high voltage
stoichiometry-polarization ("electrocoloration") of Fe-doped
SrTiO3 single crystals has been studied. For different
electrode materials (150-nm Ag/15-nm Cr and 150-nm Au/15-nm Cr)
secondary ion mass spectrometry (SIMS) was used to measure the
depth profile of the O-18-isotope after high-field stress. The
results were compared with spatially resolved impedance
measurements on electrocolored Fe-doped SrTiO3 single crystals.
For Au/Cr as well as Ag/Cr electrodes a large dc voltage leads
to moving color fronts which are usually correlated with a
pronounced stoichiometry polarization of the samples due to
electrodes blocking the ionic current. However, the local
impedance measurements demonstrate that the conductivity
profiles near the cathode depend on the electrode material.
This finding is in accordance with the SIMS measurements which
indicate that the Ag/Cr-electrodes are, in contrast to Au/Cr-
electrodes not completely inactive for the oxygen incorporation
into the Fe-doped SrTiO3. The results are discussed in terms of
defect chemical models.
2001
Article
http://edoc.mpg.de/7419
urn:ISSN:1385-3449
Journal of Electroceramics, v.7, 95-105 (2001)
en
oai:edoc.mpg.de:74262006-10-1629:895
AgCuO2 - Synthesis, crystal structure, and structural relationships with CuO and AgIAgIIIO2
Curda, J.
Klein, W.
Jansen, M.
silver cuprate(III); silver oxide; copper oxide; Rietveld
refinement
The new silver cuprate AgCuO2 was synthesized by applying a
low-temperature route. AgCuO2 precipitates as a
microcrystalline black and thermally labile powder from
concentrated aqueous solutions of copper and silver nitrate
under alkaline and oxidizing conditions. Using the positional
parameters of AgAgO2 as a starting set, Rietveld refinements
have been performed using X-ray and neutron powder data
(P2(1)/c, a = 5.8657(3), b = 2.8062(2), and c = 6.0770(3)
Angstrom, beta = 108.106(4)degrees, Z = 2, R-P = 6.61%, R-WP =
5.00% for joint refinement). The crystal structure consists of
chains of ladder-like CuO4 rectangles running along [010],
interconnected by AgO2 dumbbells. For physical and crystal
chemical reasons the oxidation states + I for silver and + III
for copper, respectively, have been assigned. Similar to AgAgO2
and CuO the metal cations form a fcc structure with oxygen at
positions slightly displaced from the centers of the octahedral
vacancies. The small differences from the AgAgO2 structure can
be traced back to a different off-center position in the
octahedral void. (C) 2001 Elsevier Science.
2001
Article
http://edoc.mpg.de/7426
urn:ISSN:0022-4596
Journal of Solid State Chemistry, v.162, 220-224 (2001)
en
oai:edoc.mpg.de:74372006-10-1629:895
Cyclotron resonance in a two-dimensional electron system with self-organized antidots
Suchalkin, S. D.
Vasil'ev, Y. B.
Zundel, M.
Nachtwei, G.
von Klitzing, K.
Eberl, K.
Experimental data are reported on studying cyclotron resonance
in a two-dimensional electron system with an artificial random
scattering potential generated by an array of self-organized
AlInAs quantum islands formed in the plane of an AlGaAs/GaAs
heterojunction. A sharp narrowing of the cyclotron resonance
line is observed as the magnetic field increases, which is
explained by the specific features of carrier scattering in
this potential. The results obtained point to the formation of
a strongly correlated electron state in strong magnetic fields
at carrier concentrations smaller than the concentration of
antidots. (C) 2001 MAIK "Nauka/ Interperiodica".
2001
Article
http://edoc.mpg.de/7437
urn:ISSN:0021-3640
JETP Letters, v.74, 564-567 (2001)
en
oai:edoc.mpg.de:74392006-10-1629:895
Coherent superposition of photon- and phonon-assisted tunneling in coupled quantum dots
Qin, H.
Holleitner, A. W.
Eberl, K.
Blick, R. H.
We report on electron transport through an artificial molecule
formed by two tunnel coupled quantum dots, which are laterally
confined in a two-dimensional electron system of an AlxGa1-
xAs/GaAs heterostructure. Coherent molecular states in the
coupled dots are probed by photon-assisted tunneling (PAT).
Above 10 GHz, we observe clear PAT as a result of the resonance
between the microwave photons and the molecular states. Below 8
GHz, a pronounced superposition of phonon- and photon-assisted
tunneling is observed. Coherent superposition of molecular
states persists under excitation of acoustic phonons.
2001
Article
http://edoc.mpg.de/7439
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:74402006-10-1629:895
Coherent nonlinear pulse propagation on a free-exciton resonance in a semiconductor
Nielsen, N. C.
Linden, S.
Kuhl, J.
Förstner, J.
Knorr, A.
Koch, S. W.
Giessen, H.
The coherent exciton-light coupling in pulse propagation
experiments on the A-exciton resonance in bulk CdSe is
investigated over a broad intensity range. At low light
intensities, polariton propagation beats due to interference
between excited states on both polariton branches are observed,
In an intermediate intensity regime, the temporal polariton
beating is suppressed in consequence of exciton-exciton
interaction, At the highest light intensities, self-induced
transmission and multiple pulse breakup are identified as a
signature for carrier density Rabi flopping. Exciton-phonon
scattering is shown to gradually eliminate coherent nonlinear
propagation effects due to enhanced dephasing of the excitonic
polarization. Calculations using the semiconductor Maxwell-
Bloch equations are in qualitative agreement with the
experimental data.
2001
Article
http://edoc.mpg.de/7440
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:74412006-10-1629:895
Optical anisotropy of (001)-GaAs surface quantum wells
Lastras-Martínez, L. F.
Rönnow, D.
Santos, P. V.
Cardona, M.
Eberl, K.
We report a reflectance difference spectroscopy (RDS) study of
the optical anisotropy of GaAs:(001) Surface quantum wells
consisting of a thin GaAs layer (3-30 nm thick) embedded
between an arsenic reconstructed surface and an AlAs barrier.
The RDS spectra display anisotropic contributions from the free
Surface and from the GaAs/AlAs interface. By comparing RDS
spectra for the c(4x4) and (2x4) Surface reconstructions, we
separate these two contributions, and demonstrate that the
anisotropy around the E-1 and E-1 + Delta(1) transitions
comprises a component originating from modifications of bulk
states near the surface. The latter is attributed to
anisotropic strains induced by the surface reconstruction. The
experimental data Lire well described by a model for the RDS
response of the multilayer structures, which also takes into
account the blue energy shifts and the changes in oscillator
strength of the E-1 and E-1 + Delta(1) transitions induced by
quantum-well confinement.
2001
Article
http://edoc.mpg.de/7441
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:74422006-10-1629:895
Renormalization of the optical response of semiconductors by electron-phonon interaction
Cardona, M.
In the past five years enormous progress has been made in the
ab initio calculations of the optical response of electrons in
semiconductors. The calculations include the Coulomb
interaction between the excited electron and the hole left
behind, as well as local field effects. However, they are
performed under the assumption that the atoms occupy fixed
equilibrium positions and do not include effects of the
interaction of the lattice vibrations with the electronic
states (electron-phonon interaction). This interaction shifts
and broadens the energies at which structure in the optical
spectra is observed, the corresponding shifts being of the
order of the accuracy claimed for the ab initio calculations.
These shifts and broadenings can be calculated with various
degrees of reliability using a number of semiempirical and ab
initio techniques, but no full calculations of the optical
spectra including electron-phonon interaction are available to
date. This article discusses experimental and theoretical
aspects of the renormalization of optical response functions by
electron-phonon interaction, including both temperature and
isotopic mass effects. Some of the theoretical techniques used
can also be applied to analyze the renormalization of other
response functions, such as the phonon spectral functions, the
lattice parameters, and the elastic constants.
2001
Article
http://edoc.mpg.de/7442
urn:ISSN:0031-8965
physica status solidi (a), v.188, 1209-1232 (2001)
en
oai:edoc.mpg.de:74482006-10-1629:895
Calculations of the atomic and electronic structure for SrTiO3 perovskite thin films
Kotomin, E. A.
Eglitis, R. I.
Maier, J.
Heifets, E.
ABO(3) perovskites; surfaces; atomic and electronic structure;
ab initio calculations
The results of calculations of SrTiO3 (100) Surface relaxation
and rumpling xith two different terminations (SrO and TiO2) are
presented and discussed. We have used the ab initio Hartree-
Fock (HF) method with electron correlation corrections and the
density functional theory (DFT) with different exchange-
correlation functionals, including hybrid exchange techniques.
All methods agree well on surface energies and on atomic
displacements, as well as on the considerable increase of
covalency effects , near the surface, More detailed experiments
on surface rumpling and relaxation are necessary for further
testing of theoretical predictions. (C) 2001 Elsevier Science
BN. All rights reserved.
2001
Article
http://edoc.mpg.de/7448
urn:ISSN:0040-6090
Thin Solid Films, v.400, 76-80 (2001)
en
oai:edoc.mpg.de:74492006-10-1629:895
Saturation of Electrical Resistivity in Metals at Large Temperatures
Calandra, M.
Gunnarsson, O.
We present a microscopic model for systems showing resistivity
saturation. An essentially exact quantum Monte Carlo
calculation demonstrates that the model describes saturation.
We give a simple explanation for saturation, using charge
conservation and considering the limit where thermally excited
phonons have destroyed the periodicity. Crucial model features
are phonons coupling to the hopping matrix elements and a unit
cell with several atoms. We demonstrate the difference to a
model of alkali-doped C-60 with coupling to the level
positions, for which there is no saturation.
2001
Article
http://edoc.mpg.de/7449
urn:ISSN:0031-9007
Physical Review Letters, v.87 (2001)
en
oai:edoc.mpg.de:74502006-10-1629:895
Crystal structure of a rigid ferrocene-based macrocycle from high-resolution X-ray powder diffraction
Dinnebier, R. E.
Ding, L.
Ma, K. B.
Neumann, M. A.
Tanpipat, N.
Leusen, F. J. J.
Stephens, P. W.
Wagner, M.
A macrocycle, 6, has been synthesized in high yield from 2,5-
di(pyrazol-1-yl)hydroquinone and 1,1'-fc[B(Me)NMe2](2) {fc =
Fe(C5H4)(2)}. The molecule incorporates two redox-active 1,1'-
ferrocenylene units in its backbone and contains four chiral
boron centers, each of them possessing the same configuration.
It is demonstrated that crystal structures of organometallics
of moderate complexity can be solved from high-resolution X-ray
powder diffraction patterns, once the connectivity between the
functional groups is known.
2001
Article
http://edoc.mpg.de/7450
urn:ISSN:0276-7333
Organometallics, v.20, 5642-5647 (2001)
en
oai:edoc.mpg.de:74512006-10-1629:895
Structure of the fluorosulfite anion: Rotational disorder of SO2F- in the alkali metal fluorosulfites and crystal structures of α- and β-CsSO2F
Kessler, U.
van Wüllen, L.
Jansen, M.
F-19 solid-state NMR spectra of the alkali metal fluorosulfites
KSO2F, RbSO2F, alpha -CsSO2F, and beta -CsSO2F show that the
fluorosulfite anion is subjected to dynamical disorder at room
temperature, This disorder can be modeled by 120 degrees
rotational jumps with respect to the C-3-Pseudoaxis of the
anion, The exchange frequency of this disorder decreases with
decreasing temperature. The calculated jump frequencies at room
temperature are 5 x 10(5) Hz for KSO2F, 2 x 10(5) Hz for
RbSO2F, 1 x 10(7) Hz for alpha -CsSO2F, and 5 x 10(5) Hz for
beta -CsSO2F, respectively. The crystal structures of alpha-
and beta -CsSO2F were determined for the First time (alpha:
Pnma; Z = 4; a = 790.98(8), b = 666.07(7), c = 798.93(9) pm; T
= 293 K. beta: R3m; Z = 3 a = 659.22(6), c = 800.50(4) pm; T =
293 K), X-ray single-crystal data of KSO2F, RbSO2F, and alpha -
CsSO2F taken at various temperatures were refined using the
disorder model developed from the NMR results. It is shown that
it is impossible to obtain reliable structural parameters of
the SO2F- ion by refinement of X-ray data as long as rotational
disorder persists, The preference of an ordered structure
increases with decreasing temperature, The degree of disorder
remaining in alpha -CsSO2F at 93 K is small, The structural
parameters of the fluorosulfite anion as obtained by a routine
refinement of this phase (S-F, 169.0(2) pm; S-O, 147.8(1) pm)
are the best lower (S-F) and upper (S-O) limits of the "true"
bond lengths determined experimentally. They comply with the
values obtained from quantum chemical calculations.
2001
Article
http://edoc.mpg.de/7451
urn:ISSN:0020-1669
Inorganic Chemistry, v.40, 7040-7046 (2001)
en
oai:edoc.mpg.de:74532006-10-1629:895
Coherent coupling of two quantum dots embedded in an Aharonov-Bohm interferometer
Holleitner, A. W.
Decker, C. E.
Qin, H.
Eberl, K.
Blick, R. H.
We define two laterally gated small quantum dots with less than
15 electrons in an Aharonov-Bohm geometry in which the coupling
between the two dots can be changed. We measure Aharonov-Bohm
oscillations for weakly coupled quantum dots. In an
intermediate coupling regime we study molecular states of the
double dot and extract the magnetic field dependence of the
coherently coupled states.
2001
Article
http://edoc.mpg.de/7453
urn:ISSN:0031-9007
Physical Review Letters, v.87 (2001)
en
oai:edoc.mpg.de:74542006-10-1629:895
Effect of pressure on crystal-field transitions of Nd-doped YLiF4
Manjón, F. J.
Jandl, S.
Syassen, K.
Gesland, J. Y.
Luminescence spectra of Nd3+-related crystal field transitions
of YLiF4 with 2% Nd doping were measured as a function of
hydrostatic pressure at T=5 K. Specifically, transitions from
the F-4(3/2) (1) excited level to the I-4(9/2) and I-4(11/2) =
states have been studied. Most of the isolated-ion transitions
show a redshift with increasing pressure up to 10 GPa,
resulting from a decrease of the Slater free-ion and spin-orbit
parameters and an increase of the crystal held interactions as
pressure increases. Spectra near the F-4(3/2)(1) to I-4(9/2)(1)
ground state emission evidence the presence of satellite lines
assigned to Nd3+-Nd3+ ion pairs coupled by magnetic dipolar
interaction. The splitting between the F-4(3/2) (1)-I-4(9/2)(
1) isolated-ion emission and its satellites is found to
increase with pressure. This effect is attributed to stronger
magnetic coupling as the Nd3+ pair distances decrease. The
pressure dependence of the F-4(3/2)(1) to I-4(9/2) = (1)
luminescence energy indicates subtle structural changes of the
scheelite phase at around 5.5(5) GPa. Major spectral changes
observed near 10 GPa indicate a first-order structural phase
transition.
2001
Article
http://edoc.mpg.de/7454
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:74552006-10-1629:895
Modeling the structure of clusters of C60 molecules
Doye, J. P. K.
Wales, D. J.
Branz, W.
Calvo, F.
We locate putative global minima for (C-60)(N) clusters modeled
by the potential of Pacheco and Prates-Ramalho up to N=105.
These minima are based on icosahedral packing up to N=15, but
above this size the lowest-energy structures are decahedral or
close packed. Although structures based on the 98-molecule
Leary tetrahedron, which have been inferred from experiment,
are not lowest in energy for this potential, an examination of
the energetics of a growth sequence leading to the Leary
tetrahedron lends further support to the experimental
assignments. An analysis of the potential energy surface
topography and the thermodynamics of two example clusters
indicates that the multiple-funnel topography is likely to have
a strong influence on the dynamics of structure formation and
that solid-solid transitions driven by differences in
vibrational entropy are likely to be common.
2001
Article
http://edoc.mpg.de/7455
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:74562006-10-1629:895
Ab initio modeling of surface structure for SrTiO3 perovskite crystals
Heifets, E.
Eglitis, R. I.
Kotomin, E. A.
Maier, J.
Borstel, G.
We present and discuss the results of calculations of SrTiO3
(100) surface relaxation and rumpling with two different
terminations (SrO and TiO2). These are based on ab initio
Hartree-Fock method with electron correlation corrections and
density functional theory calculations with different exchange-
correlation functionals, including hybrid exchange techniques.
Both approaches use the localized Gaussian-type basis set. All
methods agree well on surface energies and on atomic
displacements, as well as on considerable increase of covalency
effects nearby the surface. More detailed experiments on
surface rumpling and relaxation are necessary for further
testing theoretical predictions.
2001
Article
http://edoc.mpg.de/7456
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:74572006-10-1629:895
Efficient intracavity generation of visible pulses in a femtosecond near-infrared optical parametric oscillator
Zhang, X. P.
Hebling, J.
Kuhl, J.
Rühle, W. W.
Giessen, H.
We have achieved efficient simultaneous intracavity doubling of
the signal frequency and sum-frequency generation between the
signal and the pump in a periodically poled LiNbO3 femtosecond
optical parametric oscillator pumped by a Ti:sapphire laser.
The responsible mechanisms are second-, third-, and fourth-
order quasi-phase matching (QPM). An similar to 56% poling duty
cycle permits efficient even-order QPM. Femtosecond pulses
tunable in the visible were generated with a total efficiency
of more than 8% for only 480-mW pump power at 80 MHz.
Optimization of the poling duty cycle can improve the
efficiency further. (C) 2001 Optical Society of America.
2001
Article
http://edoc.mpg.de/7457
urn:ISSN:0146-9592
Optics Letters, v.26, 2005-2007 (2001)
en
oai:edoc.mpg.de:74582006-10-1629:895
Metallic ferromagnetism in Ni-doped La0.7Sr0.3CoO3
Wang, Z. H.
Wang, F. W.
Chen, X.
Li, R. W.
Shen, B. G.
The structure, magnetization, and electrical transport of
perovskite cobaltites La0.7Sr0.3Co1-yNiyO3 have been studied.
It is found that the substitution of Ni for Co induces no
apparent changes in bond length and angle in the Co(Ni)-O
network, and only moderately suppresses the ferromagnetism.
Moreover, a retention of the metallic conduction has been
observed from y=0 to 0.2, which is in strong contrast to the
reported insulating state of the other Co site doped
La0.7Sr0.3CoO3. A double-exchange-like interaction between Ni
ion and its neighboring Co ion is suggested to explain the
experimental results. (C) 2002 American Institute of Physics.
2001
Article
http://edoc.mpg.de/7458
urn:ISSN:0021-8979
Journal of Applied Physics, v.91, 519-521 (2001)
en
oai:edoc.mpg.de:75492006-10-1629:895
The Jc(B) of Bi2223 HTS superconducting tapes at 4.2K under high applied DC magnetic field and its hysteresis behavior
Hu, L. F.
Sulpice, A.
Mossang, E.
Li, C. S.
Ji, P.
Wu, Y. F.
Zhang, P. X.
Zhou, L.
Bi2223; AC loss; critical current; DC magnetic field
Samples of Bi2223 superconductors were prepared with
traditional PIT process. The critical current was measured with
the four-point method. The criterion of 1muV/cm was used to
define its critical curent. All measurements were done with the
samples immersed in liquid helium. Different equations are
introduced to fit the experimental results under low and high
applied magnetic field. Several factors are also considered to
investigate the hysterestic behavior.
2001
Article
http://edoc.mpg.de/7549
urn:ISSN:1002-185X
Rare Metal Materials and Engineering, v.30, 436-441 (2001)
zh
oai:edoc.mpg.de:75832006-10-1629:895
High-frequency EPR: an occasion for revisiting ligand field theory
Gatteschi, D.
Sorace, L.
Sessoli, R.
Barra, A. L.
The use of high-field electron paramagnetic resonance (EPR)
made possible for the first time to obtain detailed information
on the anisotropy of integer-spin systems, which are usually
silent at conventional EPR frequencies. The data obtained so
far by different research groups on non-Kramers ions are
reviewed within the framework of ligand field theory at
different levels of approximations. Special attention is paid
to the use of the angular overlap model, which resulted to be
very powerful both in terms of qualitative and quantitative
explanation of the experimental results.
2001
Article
http://edoc.mpg.de/7583
urn:ISSN:0937-9347
Applied Magnetic Resonance, v.21, 299-310 (2001)
en
oai:edoc.mpg.de:75842006-10-1629:895
Extrinsic versus intrinsic high-field and high-frequency EPR properties of magnetic materials
Lenci, L.
Martinelli, M.
Massa, C. A.
Pardi, L. A.
Ricci, I.
Hassan, A. K.
Caneschi, A.
Brunel, L. C.
Performing high-field and high-frequency electron paramagnetic
resonance (HFHFEPR) experiments on a one-dimensional (I-D)
magnetic system, we put in evidence a number of effects that
can be attributed to extrinsic properties of the sample and
have to be distinguished from the intrinsic physical properties
of the investigated system. We have studied a I-D molecular-
based magnetic system made up by trivalent gadoliniurn ions
(Gd3+) and the nitronyl-nitroxide radicals (NIT-Et = 2-
ethyl4,4,5,5,-tetramethyl-4,5-dihydro- l-H-imidazolyl-l-oxyl-3-
oxide). In addition to showing the effects of short-range
magnetic correlation on HFHFEPR spectra of this compound, this
paper is also intended to be a starting point of an
investigation of the methods according to which HFHTEPR spectra
should be performed in order to estimate the importance,
minimize and possibly correct the effects of orientation,
propagation and demagnetization phenomena when dealing with
magnetic materials.
2001
Article
http://edoc.mpg.de/7584
urn:ISSN:0937-9347
Applied Magnetic Resonance, v.21, 607-618 (2001)
en
oai:edoc.mpg.de:75852006-10-1629:895
High-frequency EPR spectroscopy of single-molecule magnets: a case study
Barra, A. L.
A high-frequency electron paramagnetic resonance (EPR) study of
a single-molecule magnet, [Mn12O12(CH3COO)(16)(H2O)(4)] (.)
2CH(3)COOH (.) 4H(2)O, has been performed. The analysis of the
spectra obtained at several frequencies led to an accurate
description of the ground spin multiplet. Especially the
determination of the fourth-order terms of the crystal field
interaction explains some important features of the magnetic
properties of the system. Lower-temperature measurements (T < 2
K) have shown a new signal, probably associated to a minority
species always present in the Mn12 crystals. Time-dependent
measurements indicate that the molecules responsible for this
signal play a role in the relaxation of the magnetization of
Mn12.
2001
Article
http://edoc.mpg.de/7585
urn:ISSN:0937-9347
Applied Magnetic Resonance, v.21, 619-628 (2001)
en
oai:edoc.mpg.de:75912006-10-1629:895
Probing the electronic properties of disordered two-dimensional systems by means of resonant tunnelling
Dubrovskii, Y. V.
Vdovin, E. E.
Patané, A.
Brounkov, P. N.
Larkin, I. A.
Eaves, L.
Main, P. C.
Maude, D. K.
Portal, J. C.
Ivanov, D. Y.
Khanin, Y. N.
Sirotkin, V. V.
Levin, A.
Henini, M.
Hill, G.
We investigate resonant tunnelling in GaAs/(AlGa)As double-
barrier resonant-tunnelling diodes in which a single layer of
InAs self-assembled quantum dots is embedded in the centre of
the GaAs quantum well. The dots provide a well-defined and
controllable source of disorder in the well and we use resonant
tunnelling to study the effect of this disorder on the
electronic properties of the well.
2001
Article
http://edoc.mpg.de/7591
urn:ISSN:0957-4484
Nanotechnology, v.12, 491-495 (2001)
en
oai:edoc.mpg.de:75932006-10-1629:895
Vortex states and quantum magnetic oscillations in conventional type-II superconductors
Maniv, T.
Zhuravlev, V.
Vagner, I.
Wyder, P.
The theory of pure type-II superconductors at high magnetic
fields and low temperatures has recently attracted much
attention due to the discovery of de Haas-van Alphen
oscillations deep in the vortex state. In this article the
authors review the state of the art in this rapidly growing new
field of research. The very existence of quantum magnetic
oscillations deep in the vortex state poses challenging
questions to the theorists working in this field. For a
conventional extreme type-II superconductor in magnetic fields
just below the upper critical field H-c2, the quasiparticle
spectrum is gapless and the de Haas-van Alphen effect is
suppressed with respect to the corresponding normal-state
signal due to superconducting induced currents near the vortex
cores, which are of paramagnetic nature. Numerical simulations
of the quasiparticle band structure in the Abrikosov vortex
lattice show the existence of well-separated Landau bands below
H-c2. An analytical perturbative approach, which emphasizes the
importance of phase coherence in quasiparticle scattering by
the pair potential in the Abrikosov lattice, predicts a
relatively weak magnetic breakdown of the corresponding
cyclotron orbits. In contrast to the situation in the Abrikosov
lattice state, a theory based on a random vortex lattice model
yields large exponential decay of the de Haas-van Alphen
oscillations with the superconducting order parameter below H-
c2. The disordered nature of the vortex state near H-c2 in real
superconductors, where long-range phase coherence in the
superconducting order parameter is destroyed, could explain the
success of this model in interpreting experimental data below
H-c2. In the Abrikosov vortex lattice state, which usually
stabilizes well below H,2, the residual damping of the de Haas-
van Alphen amplitude is significantly reduced. In quasi-two-
dimensional superconductors, phase fluctuations associated with
sliding Bragg chains along principal axes in the vortex lattice
lead to a weak first-order melting transition far below the
mean-field H-c2. Superconducting fluctuations dominate the
additional damping of the de Haas-van Alphen oscillations in
this vortex liquid state. Below the first-order freezing point,
this damping is predicted to weaken signifiFantly.
2001
Article
http://edoc.mpg.de/7593
urn:ISSN:0034-6861
Reviews of Modern Physics, v.73, 867-911 (2001)
en
oai:edoc.mpg.de:75952006-10-1629:895
Negative magnetoresistance due to ballistic weak localization in a dense hexagonal lattice of antidots
Pouydebasque, A.
Pogosov, A. G.
Budantsev, M. V.
Plotnikov, A. E.
Toropov, A. I.
Maude, D. K.
Portal, J. C.
An experimental analysis of the negative magnetoresistance due
to weak localization in a dense hexagonal lattice of antidots
created from a two-dimensional electron gas formed at an
AlGaAs/GaAs heterojunction is presented. The low-field
magnetoresistance is perfectly described by the conventional
theory for disordered conductors, using the phase coherence
length l(phi) and a B-independent prefactor alpha as adjustable
parameters. An unusual T-1/4 dependence is found for l(phi),
which is in contradiction to the predictions of' most of' the
models proposed for phase breaking processes. A saturation of
l(phi) is observed below 600 mK. Surprisingly, alpha, which
determines the amplitude of the weak localization correction to
the conductivity. exhibits high values ( 1.5<α<6), and a
behavior that cannot be explained by current theories of weak
localization in disordered Conductors nor in ballistic systems.
We explain semiclassically our results in terms of' electrons
trapped in the unit cells formed by the neighboring antidots,
such that the length of the interfering paths is limited by the
geometry of the cell. In this case. the weak localization and
negative magnetoresistance are more likely to be determined by
a specific dimension of the system rather than any decoherence
process.
2001
Article
http://edoc.mpg.de/7595
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:75972006-10-1629:895
Hopping conductivity in heavily doped n-type GaAs layers in the quantum Hall effect regime
Murzin, S. S.
Weiss, M.
Jansen, A. G. M.
Eberl, K.
We investigate the magnetoresistance of epitaxially grown,
heavily doped n-type GaAs layers with thickness (40-50 nm)
larger than the electronic mean free path (23 nm). The
temperature dependence of the dissipative resistance R-xx in
the quantum Hall effect regime can be well described by a
hopping law (R-xx proportional to exp{-(T-0/T)(p)}) with p
approximate to0.6. We discuss this result in terms of variable
range hopping in a Coulomb gap together with a dependence of
the electron localization length on the energy in the gap. The
value of the exponent p greater than or equal to0.5 shows that
electron-electron interactions have to be taken into account in
order to explain the occurrence of the quantum Hall effect in
these samples, which have a three-dimensional single electron
density of states.
2001
Article
http://edoc.mpg.de/7597
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:76012006-10-1629:895
Finite-size effects at diamagnetic phase transitions and in the Condon domain phase
Gordon, A.
Wyder, P.
The diamagnetic phase transition in a sample of finite
thickness (thin film) is studied. It is shown that changing the
film thickness is equivalent to shifting the diamagnetic phase-
transition to a lower temperature. Calculations of the effect
of the Condon domain influence on the specific heat temperature
jump at second-order diamagnetic phase transition in a slab are
performed. The contribution from the domain walls and
demagnetization effects to the jump in specific heat at the
phase transition is shown to be independent of the slab
thickness. We calculate the critical sample size for the
diamagnetic phase-transition existence, i.e., the film
thickness, below which the order parameter of the diamagnetic
phase transition is zero. The compressibility increase observed
in beryllium and occurring as a result of the domain formation
is qualitatively explained.
2001
Article
http://edoc.mpg.de/7601
urn:ISSN:0163-1829
Physical Review B, v.64 (2001)
en
oai:edoc.mpg.de:415272006-10-1629:895
QHREM study of thermal stability of stacked self-assembled InP quantum dots
Jin-Phillipp, N. Y.
Zundel, M. K.
Du, K.
Phillipp, F.
Eberl, K.
Thermal stability of stacked self-assembled InP quantum dots
(QDs) is studied by quantitative high-resolution electron
microscopy (QHREM). The size and the shape of the QDs as well
as local lattice distortions on an atomic scale have been
determined directly from HREM images by the image processing
package LADIA. An anisotropic thermal instability of the
vertically stacked QDs is revealed. The preferential direction
of intermixing of InP QDs with their surrounding GaInP changes
at different stages of annealing. This anisotropy is attributed
to strain-assisted interdiffusion.
IOP Publishing LTD
2001
Conference-Paper
http://edoc.mpg.de/41527
urn:ISSN:0951-3248
A.G. Cullis: Microscopy of Semiconducting Materials 2001. Proceedings of the Royal Microscopical Society Conference, IOP Publishing LTD, 93-96 (2001)
en
oai:edoc.mpg.de:415592006-10-1629:895
Unpolarizable ground states in the fractional quantum Hall effect at ν=2/3
Freytag, N.
Tokunaga, Y.
Horvatić, M.
Berthier, C.
Shayegan, M.
Lévy, L.
EDP Sciences
2001
Conference-Paper
http://edoc.mpg.de/41559
T. Martin, G. Montambaux, J.T.T. Vân: Electronic Correlations: From Meso- to Nanophysics, EDP Sciences, 59-66 (2001)
oai:edoc.mpg.de:1811452006-10-1629:895
Nonzero Hall resistance in a spatially fluctuating magnetic field with zero mean
Bykov, A. A.
Gusev, G. M.
Leite, J. R.
Bakarov, A. K.
Moshegov, N. T.
Maude, D. K.
Cassé, M.
Portal, J. C.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/181145
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 817-818 (2001)
oai:edoc.mpg.de:1811562006-10-1629:895
Unconventional Landau states in the quantum well with embedded self-arranged quantum dots
Dubrovskii, Y. V.
Volkov, V. A.
Vdovin, E. E.
Eaves, L.
Main, P. C.
Maude, D. K.
Portal, J. C.
Neumann, A.
Henini, M.
Maan, J. C.
Hill, G.
Ioffe Institute
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/181156
R. Suris: Proceedings of the 9th International Symposium on Nanostructures: Physics and Technology, Ioffe Institute (2001)
oai:edoc.mpg.de:1823252006-10-1629:895
Investigation of the cathodic polarization mechanism in SOFCs by means of LSM-microelectrodes
Brichzin, V.
Fleig, J.
Habermeier, H.-U.
Maier, J.
The Electrochemical Society
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182325
H. Yokokawa, S.C. Singhal: Solid Oxide Fuel Cells VII, The Electrochemical Society, 555-563 (2001)
oai:edoc.mpg.de:1823692006-10-1629:895
Resonant LO phonon enhanced conductivity in GaAs-AlAs superlattices
Dalton, K. S. H.
Hales, V. J.
Symons, D. M.
Nicholas, R. J.
Gassot, P.
Maude, D. K.
Portal, J. C.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182369
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 907-908 (2001)
oai:edoc.mpg.de:1823782006-10-1629:895
Resistively detected NMR in the integer and fractional quantum Hall regimes
Desrat, W.
Maude, D. K.
Potemski, M.
Portal, J. C.
Wasilewski, Z. R.
Hill, G.
Pate, M. A.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182378
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 907-908 (2001)
oai:edoc.mpg.de:1823912006-10-1629:895
Magneto-tunnelling spectroscopy of localised and extended state in a quantum well containing quantum dots
Dubrovskii, Y. V.
Patané, A.
Brounkov, P. N.
Vdovin, E. E.
Larkin, I. A.
Eaves, L.
Main, P. C.
Maude, D. K.
Portal, J. C.
Ivanov, D. Y.
Khanin, Y. N.
Sirotkin, V. V.
Levin, A.
Henini, M.
Hill, G.
Ioffe Institute
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182391
R. Suris: Proceedings of the 9th International Symposium on Nanostructures: Physics and Technology, Ioffe Institute (2001)
oai:edoc.mpg.de:1823922006-10-1629:895
Peculiarities in equilibrium tunneling between disordered two-dimensional electron systems: from Fermi edge singularity to linear gap in high magnetic field
Dubrovskii, Y. V.
Hill, R.
Volkov, V. A.
Popov, V. G.
Vdovin, E. E.
Ivanov, D. Y.
Kotel'nikov, A.
Eaves, L.
Main, P. C.
Maude, D. K.
Portal, J. C.
Henini, M.
Hill, G.
Maan, J. C.
Ioffe Institute
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182392
R. Suris: Proceedings of the 9th International Symposium on Nanostructures: Physics and Technology, Ioffe Institute (2001)
oai:edoc.mpg.de:1823982006-10-1629:895
Nuclear ferromagnetism and superconductivity at negative nuclear temperatures
Dyugaev, A. M.
Vagner, I. D.
Wyder, P.
Jahrbuch 2002, Copyright MPG 2002
2001
Article
http://edoc.mpg.de/182398
JETP Letters, v.73, 411-414 (2001)
oai:edoc.mpg.de:1824122006-10-1629:895
On the width of the electrochemically active region in mixed conducting solid oxide fuel cell cathodes
Fleig, J.
Maier, J.
The Electrochemical Society
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182412
H. Yokokawa, S.C. Singhal: Solid Oxide Fuel Cells VII, The Electrochemical Society, 583-589 (2001)
oai:edoc.mpg.de:1824442006-10-1629:895
Collapse of the excitonic states at rs=8 in high quality GaAs/AlGaAs single quantum wells
Gubarev, S. I.
Kukushkin, I. V.
Tovstonog, S. V.
Akimov, M. Y.
Kulik, L. V.
Smet, J. H.
von Klitzing, K.
Weimann, G.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182444
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 511-512 (2001)
oai:edoc.mpg.de:1824902006-10-1629:895
Density response of cuprates and renormalization of breathing phonons
Horsch, P.
Khaliullin, G.
Kluwer Academic Publishers
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182490
J. Bonča, P. Prelovšek, A. Ramšak, S. Sarkar: Proceedings of the NATO Advanced Research Workshop: Open Problems in Strongly Correlated Electron Systems, Kluwer Academic Publishers, 81-90 (2001)
oai:edoc.mpg.de:1824952006-10-1629:895
Natural of the localized phase in a two-dimensional electron system
Itskevich, I. E.
Hill, R. J. A.
Stoddart, S. T.
Murphy, H. M.
Thornton, A. S. G.
Main, P. C.
Eaves, L.
Henini, M.
Maude, D. K.
Portal, J. C.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182495
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 857-858 (2001)
oai:edoc.mpg.de:1825122006-10-1629:895
Spin excitations in copper oxide superconductors
Keimer, B.
Princeton University Press
Jahrbuch 2002, Copyright MPG 2002
2001
InBook
http://edoc.mpg.de/182512
More is different: Fifty Years of Condensed Matter Physics, 91-101 (2001)
oai:edoc.mpg.de:1825472006-10-1629:895
Spin-flip inelastic light scattering of excitations from partially filled Landau level
Kulik, L. V.
Kukushkin, I. V.
Kirpichev, V. E.
Smet, J. H.
von Klitzing, K.
Wegscheider, W.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182547
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1003-1004 (2001)
oai:edoc.mpg.de:1825532006-10-1629:895
Small size gated gallistic interferometer on the basis AlGaAs/GaAs heterostructure
Kvon, Z. D.
Ol'shanetskiĭ, E. B.
Plotnikov, A. Y.
Cassé, M.
Maude, D. K.
Portal, J. C.
Gauffier, J. L.
Toropov, A. I.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182553
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1819-1820 (2001)
oai:edoc.mpg.de:1825592006-10-1629:895
Resistance resonance through magnetic edge states
Lawton, D. N.
Nogaret, A.
Bending, S. J.
Maude, D. K.
Portal, J. C.
Henini, M.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182559
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 903-904 (2001)
oai:edoc.mpg.de:1825802006-10-1629:895
Spin effects in the magneto drag
Lok, J. G. S.
Kraus, S.
Pohlt, M.
Dietsche, W.
von Klitzing, K.
Wegscheider, W.
Bichler, M.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182580
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 893-894 (2001)
oai:edoc.mpg.de:1825952006-10-1629:895
Polarization of magneto-polaritons in a semiconductor microcavity
Martin, M. D.
Burgas, S.
Alonso, M. I.
Vina, L.
Teran, F. J.
Potemski, M.
Mendez, E. E.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182595
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 671-672 (2001)
oai:edoc.mpg.de:1826022006-10-1629:895
Inhomogeneous Luttinger Liquids: Power-laws and energy scales
Meden, V.
Metzner, W.
Schollwöck, U.
Schönhammer, K.
Kluwer Academic Publishers
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182602
J. Bonča, P. Prelovšek, A. Ramšak, S. Sarkar: Proceedings of the NATO Advanced Research Workshop: Open Problems in Strongly Correlated Electron Systems, Kluwer Academic Publishers, 283-292 (2001)
oai:edoc.mpg.de:1826332006-10-1629:895
Bistable resistance transition in a ferromagnetic quantum Hall system
Nachtwei, G.
Manolescu, A.
Nestle, N.
Künzel, H.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182633
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 997-998 (2001)
oai:edoc.mpg.de:1826442006-10-1629:895
Orbital order versus orbital liquid in doped Manganites
Oleś, A. M.
Feiner, L. F.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
InBook
http://edoc.mpg.de/182644
Band-Ferromagnetism: Ground-State and Finite-Temperature Phenomena, 226-240 (2001)
oai:edoc.mpg.de:1826732006-10-1629:895
Magnetotransport in square and triangular lattice of large and dense antidots: comparable study
Pogosov, A. G.
Budantsev, M. V.
Kvon, Z. D.
Pouydebasque, A.
Plotnikov, A. E.
Toropov, A. I.
Portal, J. C.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182673
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 911-912 (2001)
oai:edoc.mpg.de:1826752006-10-1629:895
Magnetotransport and capacitance investigations of strongly coupled but spatially separated 2D electron and hole systems
Pohlt, M.
Lynass, M.
Dietsche, W.
von Klitzing, K.
Eberl, K.
Mühle, R.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182675
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 789-790 (2001)
oai:edoc.mpg.de:1826802006-10-1629:895
Polaron coupling in high density GaAs quantum wells
Poulter, A. J. L.
Zeman, J.
Maude, D. K.
Potemski, M.
Martinez, G.
Riedel, A.
Hey, R.
Friedland, K. J.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182680
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1005-1006 (2001)
oai:edoc.mpg.de:1826822006-10-1629:895
Weak localization in a lattice of antidots
Pouydebasque, A.
Pogosov, A. G.
Budantsev, M. V.
Maude, D. K.
Plotnikov, A. E.
Toropov, A. I.
Portal, J. C.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182682
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1353-1354 (2001)
oai:edoc.mpg.de:1827462006-10-1629:895
GaN electronic structure and luminescence mechanisms from magneto-optics in high magnetic fields
Stępniewski, R.
Wysmołek, A.
Potemski, M.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182746
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1513-1514 (2001)
oai:edoc.mpg.de:1827562006-10-1629:895
Insulating states of a 2-dimensional electron-hole system in high magnetic field
Takashina, K.
Nicholas, R. J.
Kardynal, B.
Mason, N. J.
Maude, D. K.
Portal, J. C.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182756
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 895-896 (2001)
oai:edoc.mpg.de:1827622006-10-1629:895
Magneto-optical transitions involving 2 DEG confined in Cd(Mn)Te/CdMnTe quantum wells
Teran, F. J.
Potemski, M.
Kossacki, P.
Hawrylak, P.
Karczewski, G.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182762
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 723-734 (2001)
oai:edoc.mpg.de:1827632006-10-1629:895
Effects of non-linear spin splitting on the quantum transport in a 2 DEG in CdMnTe/CdMTe modulation doped quantum wells
Teran, F. J.
Potemski, M.
Maude, D. K.
Andrearczyk, T.
Jaroszynski, J.
Karczewski, G.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182763
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 943-944 (2001)
oai:edoc.mpg.de:1827642006-10-1629:895
Magneto-optical evidence of many-body effects in spin-polarized 2 D electron gas
Testelin, C.
Lemaitre, A.
Rigaux, C.
Wojtowicz, T.
Karczewski, G.
Teran, F. J.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182764
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 551-552 (2001)
oai:edoc.mpg.de:1827912006-10-1629:895
Kondo physics on single and electrostatically coupled quantum dots
Weis, J.
Schmid, J.
Wilhelm, U.
Keller, M.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182791
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1013-1014 (2001)
oai:edoc.mpg.de:1827952006-10-1629:895
Magneto-electroluminescence study of single and double V-groove quantum wires
Weman, H.
Jullian, S.
Dupertuis, M. A.
Potemski, M.
Rudra, A.
Kapon, E.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182795
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1119-1120 (2001)
oai:edoc.mpg.de:1828042006-10-1629:895
Coupled plasmon-LO phonon modes at high magnetic fields
Wysmołek, A.
Potemski, M.
Slupinski, T.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182804
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 87-88 (2001)
oai:edoc.mpg.de:1828052006-10-1629:895
Selectice magneto-luminescence spectroscopy of shallow donors in n-GaAs
Wysmołek, A.
Potemski, M.
Stępniewski, R.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/182805
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1393-1394 (2001)
oai:edoc.mpg.de:2853702006-10-1629:895
Electron-phonon coupling in A3C60 (A = K, Tb)
Gunnarsson, O.
Han, J.E.
2001
Article
http://edoc.mpg.de/285370
AIP Conference Proceedings, v.591, 425-429 (2001)
en
oai:edoc.mpg.de:2853962006-10-1629:895
Alternative Approaches to Endohedral Fullerenes as well as to New Fullerides
Brumm, H.
Haufe, O.
Reich, A.
Wedig, U.
Jansen, M.
2001
Article
http://edoc.mpg.de/285396
AIP Conference Proceedings, v.591, 81-85 (2001)
en
oai:edoc.mpg.de:2853972012-02-2829:895
Anwendung dichter Zufallspackungen von Kugeln zur Modellierung kovalenter Amorpher Systeme
Hannemann, A.
Schön, J. C.
Jansen, M.
2001
Article
http://edoc.mpg.de/285397
Zeitschrift für Kristallographie, Supplement, v.18, 66-66 (2001)
oai:edoc.mpg.de:2853982006-10-1629:895
Kristallchemische Äquivalenz von Gold- und schweren Halogenanionen in Halogenid-bzw. Auridauraten
Mudring, A.-V.
Jansen, M.
2001
Article
http://edoc.mpg.de/285398
Zeitschrift für Kristallographie, Supplement, v.18, 117-117 (2001)
oai:edoc.mpg.de:2853992006-10-1629:895
Aufbauprinzip von Alkalimetalloxidhalogeniden
Mudring, A.-V.
Jansen, M.
2001
Article
http://edoc.mpg.de/285399
Zeitschrift für Kristallographie, Supplement, v.18, 121-121 (2001)
oai:edoc.mpg.de:2854022006-10-1629:895
New Fiber Precursors in the System Si-B-N-C
Clade, J.
Sporn, D.
Müller, U.
Jansen, M.
Wiley-VCH Verlag GmbH & Co. KGaA
2001
InBook
http://edoc.mpg.de/285402
High Temperature Ceramic Matrix Composites, 62-65 (2001)
en
oai:edoc.mpg.de:2854522006-10-1629:895
Orbital dynamics: The origin of anomalous magnon softening in ferromagnetic manganites
Khaliullin, G.
Kilian, R.
Kluwer Academic Publishers
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/285452
J. Bonča, P. Prelovšek, A. Ramšak, S. Sarkar: Proceedings of the NATO Advanced Research Workshop: Open Problems in Strongly Correlated Electron Systems, Kluwer Academic Publishers (2001)
oai:edoc.mpg.de:2854532006-10-1629:895
Inelastic X-ray scattering study of phonons in GaN and diamond
Ruf, T.
Serrano, J.
Cardona, M.
Pavone, P.
Pabst, M.
Krisch, M.
D'Astuto, M.
Suski, T.
Grzegory, I.
Leszczynski, M.
Anthony, T.R.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/285453
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 1531-1532 (2001)
oai:edoc.mpg.de:2854542006-10-1629:895
Isotope effect on the thermal conductivity of silicon
Ruf, T.
Henn, R.W.
Asen-Palmer, M.
Cardona, M.
Pohl, H.-J.
Devyatych, G.G.
Sennikov, P.G.
Bollmann, J.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/285454
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 132-133 (2001)
oai:edoc.mpg.de:2854552016-03-0229:895
Raman study of isotopically tailored CuBr
Serrano, J.
Widulle, F.
Ruf, T.
Lin, C. T.
Cardona, M.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/285455
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 67-68 (2001)
oai:edoc.mpg.de:2854562006-10-1629:895
Magnetic resonance peak and nonmagnetic impurities
Sidis, Y.
Bourges, P.
Keimer, B.
Regnault, L.P.
Bossy, J.
Ivanov, A.
Hennion, B.
Gautier-Picard, P.
Collin, G.
Kluwer Academic Publishers
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/285456
J. Bonča, P. Prelovšek, A. Ramšak, S. Sarkar: Proceedings of the NATO Advanced Research Workshop: Open Problems in Strongly Correlated Electron Systems, Kluwer Academic Publishers (2001)
oai:edoc.mpg.de:2854622006-10-1629:895
Isotope disorder effects in the Raman spectrum
Widulle, F.
Ruf, T.
Konuma, M.
Silier, I.
Kriegseis, W.
Ozhogin, V.I.
Cardona, M.
Springer Verlag
Jahrbuch 2002, Copyright MPG 2002
2001
Conference-Paper
http://edoc.mpg.de/285462
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 69-70 (2001)
oai:edoc.mpg.de:2854632006-10-1629:895
X-ray resonant scattering studies of charge and orbital ordering in Pr1-xCaxMnO3
v. Zimmenmann, M.
Nelson, C.S.
Hill, J.P.
Gibbs, D.
Blume, M.
Casa, D.
Keimer, B.
Murakami, Y.
Kao, C.-C.
Venkataraman, C.
Gog, T.
Tomioka, Y.
Tokura, Y.
2001
Article
http://edoc.mpg.de/285463
Journal of Magnetism and Magnetic Materials, v.233, 31-37 (2001)
oai:edoc.mpg.de:2854642006-10-1629:895
Absolute spin magnetic moment of FeF2 from high-energy photom diffraction
Strempfer, J.
Rütt, U.
Jauch, W.
2001
Article
http://edoc.mpg.de/285464
APS FOREFRONT 1, v.ANL/APS/TB-1, 149-151 (2001)
oai:edoc.mpg.de:2854782006-10-1629:895
Field emission from carbon nanotubes: the first five years
Bonard, J.M.
Kind, H.
Stöckli, T.
Nilsson, L.O.
2001
Article
http://edoc.mpg.de/285478
Solid State Electronics, v.45, 893-914 (2001)
oai:edoc.mpg.de:2854802006-10-1629:895
Influence of the deposition conditions on the field emission properties of patterned nitrogenated carbon nanotube films
Bonard, J.M.
Kurt, R.
Klinke, C.
2001
Article
http://edoc.mpg.de/285480
Chemical Physics Letters, v.343, 21-27 (2001)
oai:edoc.mpg.de:2854812006-10-1629:895
Raman investigation of single oxidized carbon nanotubes
Mews, A.
Jiang, C.
Schüssler, T.
Philipp, G.
Fan, Y.
Burghard, M.
2001
Article
http://edoc.mpg.de/285481
Israel Journal of Chemistry, v.41, 15-22 (2001)
oai:edoc.mpg.de:2854822006-10-1629:895
Effect of van der Waals interactions on the Raman modes in single walled carbon nanotubes
Rao, A.M.
Chen, J.
Richter, E.
Schlecht, U.
Eklund, P.C.
Haddon, R.C.
Venkateswaran, U.D.
Kwon, Y.-K.
Tománek, D.
2001
Article
http://edoc.mpg.de/285482
Physical Review Letters, v.86, 3895-3898 (2001)
oai:edoc.mpg.de:2856492015-05-2829:895
Structure of Superconducting [BaCuOx]2/[CaCuO2]n Superlattices on SrTiO3(001) Investigated by X-ray Scattering
Aruta, C.
Zegenhagen, J.
Cowie, B.
Balestrino, G.
Pasquini, G.
Medaglia, P. G.
Ricci, F.
Luebbert, D.
Baumbach, T.
Riedo, E.
Ortega, L.
Kremer, R. K.
Albrecht, J.
2001
Article
http://edoc.mpg.de/285649
physica status solidi (a), v.183, 353-364 (2001)
oai:edoc.mpg.de:2857692006-10-1629:895
Rietveld Refinement from Powder Diffraction Data
Dinnebier, R. E.
2001
Article
http://edoc.mpg.de/285769
Commission on Powder Diffraction International Union of Crystallography, Newsletter, v.26 (2001)
oai:edoc.mpg.de:2857712006-10-1629:895
Rietveld refinements with Jana2000
Dusek, M.
Petricek, V.
Wunschel, M.
Dinnebier, R. E.
van Smaalen, S.
2001
Article
http://edoc.mpg.de/285771
Commission on Powder Diffraction International Union of Crystallography, Newsletter, v.26 (2001)
oai:edoc.mpg.de:2858672006-10-1629:895
Eine Scientometrische Analyse zur wissenschaftlichen Zusammenarbeit zwischen Deutschland und Ungarn
Cardona, M.
Marx, W.
Institut f¨ur Auslandsbeziehungen
2001
Conference-Paper
http://edoc.mpg.de/285867
K.-J. Maaß: IFA-Dokumente, Institut f¨ur Auslandsbeziehungen (2001)
oai:edoc.mpg.de:2858692006-10-1629:895
Effects of Electron-Phonon Interaction on the Optical Response of Semiconductors
Cardona, M.
Scuola Normale Superiore, Ann. Scuola Normale Superiore
2001
InBook
http://edoc.mpg.de/285869
Electrons and Photons in Solids, a volume in honour of Franco Bassani, 25 (2001)
oai:edoc.mpg.de:2867252006-10-1629:895
Quasi-stationary magnetic fields of 60 T using inductive energy storage
Aubert, G.
van Bockstal, L.
Fernandez, E.
Joss, W.
Kuchinski, V.
Kurtz, R.
Mikhailov, N.
Sala, P.
2001
Article
http://edoc.mpg.de/286725
IEEE Transactions on Applied Superconductivity, v.12, 703-706 (2001)
oai:edoc.mpg.de:2867262006-10-1629:895
Localization and quantum chaos: order, disorder and chaos in 2D lattice of coupled Sinai billiards
Budantsev, M. V.
Kvon, Z. D.
Pogosov, A. G.
Portal, J. C.
2001
Article
http://edoc.mpg.de/286726
Physics Uspekhi, v.44, 109-125 (2001)
oai:edoc.mpg.de:2867272006-10-1629:895
Mesure des coefficients de transfert thermique par convection forcée en mini-canaux
Debray, F.
Franc, J. P.
Maitre, T.
Reynaud, S.
2001
Article
http://edoc.mpg.de/286727
Mécanique & Industrie, v.2, 443-454 (2001)
oai:edoc.mpg.de:2867282006-10-1629:895
Relationship between classical and quantum lifetimes in AlGaN/GaN heterostructures
Lee, K. J.
Harris, J. J.
Wang, T.
Sakai, S.
Bougrioua, Z.
Moerman, I.
Thrush, E. J.
Webb, J. B.
Tang, H.
Martin, T.
Maude, D. K.
Portal, J. C.
2001
Article
http://edoc.mpg.de/286728
Semiconductor Science and Technology, v.16, 402-405 (2001)
oai:edoc.mpg.de:2867292006-10-1629:895
Tunneling spectroscopy of quasi 2D magnetoplasmon
Volkov, V. A.
Takhtamirov, E.
Dubrovskii, Y. V.
Ivanov, D. Y.
Eaves, L.
Main, P. C.
Maude, D. K.
Portal, J. C.
Henini, M.
Hill, G.
2001
Article
http://edoc.mpg.de/286729
Physics Uspekhi, v.171 (2001)
oai:edoc.mpg.de:2867632006-10-1629:895
Polarization of magneto-polaritons in se semiconductor microcavity
Burgas, S.
Alonso, M.
Vina, L.
Teran, F. J.
Potemski, M.
Mendez, E. E.
Springer Verlag
2001
Conference-Paper
http://edoc.mpg.de/286763
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag (2001)
oai:edoc.mpg.de:2867642006-10-1629:895
New long-lived polarons in InAs/GaAs self-assembled quantum dots
Hameau, S.
Guldner, Y.
Verzelen, O.
Ferreira, R.
Bastard, G.
Deleporte, E.
Zeman, J.
Gérard, J. M.
Springer Verlag
2001
Conference-Paper
http://edoc.mpg.de/286764
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag (2001)
oai:edoc.mpg.de:2867652006-10-1629:895
Resistance resonance through magnetic edge states
Lawton, D. N.
Nogaret, A.
Bending, S. J.
Maude, D. K.
Portal, J. C.
Henini, M.
Springer Verlag
2001
Conference-Paper
http://edoc.mpg.de/286765
N. Miura, T. Ando: Proceedings of the 25th International Conference on the Physics of Semiconductors, Springer Verlag, 903-904 (2001)
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