LOCALIZATION PHASE-DIAGRAM FOR A DISORDERED 2-DIMENSIONAL SYSTEM IN A MAGNETIC-FIELD

被引：5
|
作者：
GAMMEL, BM
FISCHER, SF
机构：
[1] Physik Department, Technische Universität M̈nchen
来源：
PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.66.2919
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The phase diagram for the Anderson transition of a two-dimensional disordered system with variable impurity concentration and a perpendicular magnetic field is investigated. A phase boundary is found, separating localized from extended states. It is calculated by means of a finite-size-scaling approach. The shape of the phase boundary and the change in the magnetoresistance are explained in terms of quantum interference effects, i.e., weak localization. A critical exponent for the correlation length and the onset of the delocalized phase are determined.
引用
收藏
页码：2919 / 2922
页数：4
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