CURRENT-CARRYING STATES IN THE LOWEST LANDAU-LEVEL

被引：167

作者：

HUO, Y

BHATT, RN

机构：

[1] Department of Electrical Engineering, Princeton University, Princeton

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.68.1375

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed numerical calculations for noninteracting electrons in two dimensions in the high-magnetic-field (lowest-Landau-level) limit in the presence of a random potential. By identifying the first Chern character of each eigenstate, we show directly from the data for sizes varying from N = 8 flux quanta to N = 128 that the lowest Landau level has extended eigenstates only at a single energy E(c) (the center of the band). The localization length-xi is found to diverge as (E - E(c))-nu, with nu = 2.4 +/- 0.1, in agreement with previous calculations.

引用

页码：1375 / 1378

页数：4

共 25 条

[1] SCALING THEORY OF LOCALIZATION - ABSENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS [J].