ANDERSON LOCALIZATION IN THE LOWEST LANDAU-LEVEL FOR A 2-SUBBAND MODEL

被引：49

作者：

HIKAMI, S ^{[1
]}

SHIRAI, M ^{[1
]}

WEGNER, F ^{[1
]}

机构：

[1] RUPRECHT KARLS UNIV HEIDELBERG,INST THEORET PHYS,D-69120 HEIDELBERG,GERMANY

来源：

NUCLEAR PHYSICS B | 1993年 / 408卷 / 03期

关键词：

D O I：

10.1016/0550-3213(93)90373-W

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The quantum Hall effect is related to the extended states in the Landau level. A model with a special impurity scattering process of the two-dimensional electrons in a strong magnetic field is introduced which allows the electrons to be scattered between two different states. For this model a nonvanishing conductivity is obtained at the band center of the lowest Landau level and the density of states becomes singular at this band center. The exact value of the diagonal conductivity is evaluated for a gaussian white-noise potential. The singularity of the density of state is studied in a 1/N expansion.

引用

页码：415 / 426

页数：12

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