High frequency conductivity in the quantum Hall regime

被引：41

作者：

Hohls, F ^{[1
]}

Zeitler, U ^{[1
]}

Haug, RJ ^{[1
]}

机构：

[1] Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.86.5124

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

\We have measured the complex conductivity sigma (xx) of a two-dimensional electron system in the quantum Hall regime up to frequencies of 6 GHz at electron temperatures below 100 mK. Using both its imaginary and real part we show that v,, can be scaled to a single function for different frequencies and several transitions between plateaus in the quantum Hall effect. Additionally, the conductivity in the variable-range hopping regime is used for a direct evaluation of the localization length xi. Even for large filling factor distances deltav from the critical point we find xi x deltav(-gamma) with a scaling exponent gamma = 2.3.

引用

页码：5124 / 5127

页数：4

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