Zero-Bias Anomalies in Narrow Tunnel Junctions in the Quantum Hall Regime

被引：7

作者：

Jiang, P. ^{[1
,2
,3
]}

Chien, C. -C. ^{[1
,2
]}

Yang, I. ^{[1
,2
]}

Kang, W. ^{[1
,2
]}

Baldwin, K. W. ^{[4
]}

Pfeiffer, L. N. ^{[4
]}

West, K. W. ^{[4
]}

机构：

[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[3] Natl Taiwan Normal Univ, Dept Phys, Taipei 116, Taiwan

[4] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 24期

关键词：

CHIRAL LUTTINGER LIQUIDS; EDGE; STATES; EXCITATIONS; TRANSPORT; CONTACTS; SYSTEMS;

D O I：

10.1103/PhysRevLett.105.246801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the study of cleaved-edge-overgrown line junctions with a serendipitously created narrow opening in an otherwise thin, precise line barrier. Two sets of zero-bias anomalies are observed with an enhanced conductance for filling factors nu > 1 and a strongly suppressed conductance for nu < 1. A transition between the two behaviors is found near nu approximate to 1. The zero-bias anomaly ( ZBA) line shapes find explanation in Luttinger liquid models of tunneling between quantum Hall edge states. The ZBA for nu < 1 occurs from strong backscattering induced by suppression of quasiparticle tunneling between the edge channels for the n = 0 Landau levels. The ZBA for nu > 1 arises from weak tunneling of quasiparticles between the n = 1 edge channels.

引用

页数：4

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