Effect of a perpendicular magnetic field on the zero-bias anomaly in two-dimensional electron systems

被引：1

作者：

Siegert, C. ^{[1
]}

Ghosh, A. ^{[2
]}

Pepper, M. ^{[1
]}

Farrer, I. ^{[1
]}

Ritchie, D. A. ^{[1
]}

Anderson, D. ^{[1
]}

Jones, G. A. C. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.78.073302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low-energy electronic density of states (DOS) in GaAs/AlGaAs-based two-dimensional systems is investigated at mesoscopic length scales. Using nonequilibrium magnetotransport spectroscopy we find resonances in the DOS to be extremely sensitive to perpendicular magnetic fields as small as a few millitesla and to oscillate reproducibly as a function of the field. Since these resonances (also called zero-bias anomalies) are discussed as an indication of spontaneous spin polarization at low temperature, this Brief Report demonstrates a strong sensitivity of such possible polarization to magnetic fields.

引用

页数：4

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