Abstract
We use a quasi-Corbino sample geometry with independent contacts to different edge states in the quantum Hall effect regime to investigate the edge energy spectrum of a bilayer electron system at a total filling factor of ν=2. By analyzing nonlinear I–V curves in normal and tilted magnetic fields, we conclude that the edge energy spectrum is in a close connection with the bulk one. At the bulk phase transition spin-singlet-canted antiferromagnetic phase, the I–V curve becomes linear, indicating the disappearance or strong narrowing of the ν=1 incompressible strip at the edge of the sample.
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From Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 79, No. 4, 2004, pp. 206–211.
Original English Text Copyright © 2004 by Deviatov, Würtz, Lorke, Melnikov, Dolgopolov, Wixforth, Campman, Gossard.
This article was submitted by the authors in English.
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Deviatov, E.V., Würtz, A., Lorke, A. et al. Manifestation of the bulk phase transition in the edge energy spectrum in a two-dimensional bilayer electron system. Jetp Lett. 79, 171–176 (2004). https://doi.org/10.1134/1.1738717
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DOI: https://doi.org/10.1134/1.1738717