OBSERVATION OF EXCESS CONDUCTANCE OF A CONSTRICTED ELECTRON-GAS IN THE FRACTIONAL QUANTUM HALL REGIME

被引：8

作者：

ALPHENAAR, BW ^{[1
]}

WILLIAMSON, JG ^{[1
]}

VANHOUTEN, H ^{[1
]}

BEENAKKER, CWJ ^{[1
]}

FOXON, CT ^{[1
]}

机构：

[1] PHILIPS RES LABS, REDHILL RH1 5HA, SURREY, ENGLAND

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.45.3890

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present experimental results on the conductance of a two-dimensional electron system of filling factor nu(2D) in the fractional quantum Hall regime, containing a constricted region of lower filling factor nu(c). Conductance fluctuations are observed as a function of the voltage on the gate defining the constriction. The temperature dependence of the fluctuations exhibits three distinct regimes, governed by nu(c). For temperatures below 100 mK, and for nu(2D) = 1/3, one anomalous peak increases to a value above the quantized conductance nu(2D)(e2/h) of the bulk.

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页码：3890 / 3893

页数：4

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