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



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ID: 305992.0, MPI für Festkörperforschung / FKF Publikationen 2006
The role of density imbalance in the νT=1 exciton condensate state for electron bilayer systems
Authors:Wiersma, R. D.; Lok, J. G. S.; Dietsche, W.; von Klitzing, K.; Schuh, D.; Wegscheider, W.
Language:English
Date of Publication (YYYY-MM-DD):2006
Title of Journal:physica status solidi (b)
Volume:243
Issue / Number:14
Start Page:3643
End Page:3647
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:We report on our experimental work involving the nu(T) = I exciton
condensate in independently contacted bilayer two-dimensional electron
systems. A phase diagram between the weakly coupled (nu(U) = 1/2, nu(L)
= 1/2) phase and the strongly coupled nu(T) = 1 phase is experimentally
investigated as a function of d/l(B) and electron density imbalance
Delta n (equivalent to [n(L) - nU]/n(T)) using a drag current
configuration. For imbalanced electron layer densities, small
interlayer imbalances lead to strengthening of the excitonic phase.
Here density imbalance leads to a phase boundary in the drag layer
which is symmetric around zero imbalance. Surprisingly this behavior is
not seen for rho(drive,xx), where an unusual asymmetric behavior around
zero im-balance occurs. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA,
Weinheim.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Festkörperforschung
External Affiliations:Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
; Univ Regensburg, Fak Phys, D-93040 Regensburg, Germany.
; Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.
Identifiers:ISI:000242536200009 [ID No:1]
ISSN:0370-1972 [ID No:2]
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