NONUNIVERSAL DELOCALIZATION IN A STRONG MAGNETIC-FIELD

被引：38

作者：

MIECK, B

机构：

[1] Max-Planck-Institut fur Kernphysik, Heidelberg

来源：

EUROPHYSICS LETTERS | 1990年 / 13卷 / 05期

关键词：

D O I：

10.1209/0295-5075/13/5/013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A method is described for a proper numerical simulation of various random potentials and is used to compare the distributions of the potentials, projected onto the first two Landau bands. In the case of a slowly varying potential (correlation length » cyclotron radius) we find a universal distribution, proving an expected universality for the delocalization transition, whereas for a short-range potential the distributions in the higher Landau bands become nonuniversal. Numerical simulations in the first Landau level support nonuniversal localization properties for very short-range correlations. © 1990 IOP Publishing Ltd.

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页码：453 / 458

页数：6

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