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26 April 2024

» arxiv » cond-mat/0402417

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Manifestation of the bulk phase transition in the edge energy spectrum in a two dimensional bilayer electron system
E.V. Deviatov ; A. Wurtz ; A.Lorke ; M.Yu. Melnikov ; V.T. Dolgopolov ; A. Wixforth ; K.L. Campman ; A.C. Gossard ;
Date:	16 Feb 2004
Journal:	Jetp Letters, vol 79, i. 4, page 206 (2004)
Subject:	Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons \| cond-mat.mes-hall cond-mat.str-el
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 total filling factor $ u=2$. By analyzing non-linear $I-V$ 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 $I-V$ curve becomes to be linear, indicating the disappearance or strong narrowing of the $ u=1$ incompressible strip at the edge of the sample.
Source:	arXiv, cond-mat/0402417
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