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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2006     Display Documents



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ID: 306121.0, MPI für Festkörperforschung / FKF Publikationen 2006
Coupled plasmon-LO-phonon modes at high-magnetic fields
Authors:Wysmołek, A.; Plantier, D.; Potemski, M.; Slupinski, T.; Zytkiewicz, Z. R.
Language:English
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Physical Review B
Volume:74
Issue / Number:16
Sequence Number of Article:165206
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:High-magnetic-field (up to 28 T) inelastic light scattering experiments
on coupled plasmon-LO-phonon modes in degenerate n-type GaAs are
reported. The data are analyzed using a standard, dielectric function
approach. Results obtained for samples with high electron concentration
are well understood. A strong interaction of coupled LO-phonon-plasmon
modes with the collective cyclotron resonance excitations (Bernstein
modes) is observed. In samples with lower electron concentration, an
unexpected Raman scattering signal in the vicinity of the undressed
optical phonon is observed at high magnetic fields. A field induced
metal-insulator transition is shown to be traced with Raman scattering
experiments in samples with the lowest electron concentration.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Festkörperforschung
External Affiliations:Max Planck Inst Festkorperforsch, CNRS, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France.
; Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
; Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland.
Identifiers:ISI:000241723700048 [ID No:1]
ISSN:1098-0121 [ID No:2]
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