Manifestation of the bulk phase transition in the edge energy spectrum in a two dimensional bilayer electron system

Details Manifestation of the bulk phase transition in the edge energy spectrum in a two dimensional bilayer electron system Manifestation of the bulk phase transition in the edge energy spectrum in a two dimensional bilayer electron system

2004-02-16

arxiv.org/abs/cond-mat/0402417v1

Jetp Letters, vol 79, i. 4, page 206 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

10.1134/1.1738717

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 $\nu=2$. 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 $\nu=1$ incompressible strip at the edge of the sample.

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