✦ LIBER ✦

Edge state propagation direction in the fractional quantum Hall regime: multi-terminal magnetocapacitance experiment

✍ Scribed by J.S. Moon; J.A. Simmons; B.L. Johnson; J.L. Reno

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 144 KB
Volume: 6
Category: Article
ISSN: 1386-9477
DOI: 10.1016/s1386-9477(99)00057-0

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✦ Synopsis

The propagation direction of fractional quantum Hall e ect (FQHE) edge states has been investigated experimentally via the symmetry properties of the multi-terminal capacitances of a two-dimensional electron gas. Although strong asymmetries with respect to zero magnetic ÿeld appear, no asymmetries with respect to even denominator Landau level ÿlling factor are seen. This indicates that current-carrying FQHE edge states propagate in the same direction as integer QHE edge states. In addition, anomalous capacitance features, indicative of enhanced bulk conduction, are observed at = 1 2 and 3 2 .

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