The role of density imbalance in the νT = 1 exciton condensate state for electron bilayer systems
Year: 2006
Type: article
Abstract: We report on our experimental work involving the ν T = 1 exciton condensate in independently contacted bilayer two‐dimensional electron systems. A phase diagram between the weakly coupled (ν U = 1/2, ν L = 1/2) phase and the strongly coupled ν T = 1 phase is experimentally investigated as a function of d /ℓB and electron density imbalance Δn (≡ [n L – n U]/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 ϱ drive,xx , where an unusual asymmetric behavior around zero imbalance occurs. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Source: physica status solidi (b)
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2095689746