Optical Hall Effect in the Integer Quantum Hall Regime

被引：89

作者：

Ikebe, Y. ^{[1
]}

Morimoto, T. ^{[1
]}

Masutomi, R. ^{[1
]}

Okamoto, T. ^{[1
]}

Aoki, H. ^{[1
]}

Shimano, R. ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 25期

基金：

日本科学技术振兴机构;

关键词：

2-DIMENSIONAL ELECTRON-GAS; 2; DIMENSIONS; LOCALIZATION; CONDUCTIVITY; SPECTROSCOPY; CONDUCTANCE; ABSENCE; DOMAIN; SYSTEM;

D O I：

10.1103/PhysRevLett.104.256802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optical Hall conductivity sigma(xy)(omega) is measured from the Faraday rotation for a GaAs/AlGaAs heterojunction quantum Hall system in the terahertz-frequency regime. The Faraday rotation angle (similar to fine-structure constant similar to mrad) is found to significantly deviate from the Drude-like behavior to exhibit a plateaulike structure around the Landau-level filling nu = 2. The result, which fits with the behavior expected from the carrier localization effect in the ac regime, indicates that the plateau structure, although not quantized, still exists in the terahertz regime.

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页数：4

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