EVIDENCE FOR ANDERSON TRANSITIONS IN 2D

被引：7

作者：

FASTENRATH, U

机构：

[1] Institut für Theoretische Physik, Universität zu Köln, D-5000 Köln 41

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 76卷 / 06期

关键词：

D O I：

10.1016/0038-1098(90)90642-O

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We examine the 2d Anderson model numerically and find a behaviour for large as well as for weak magnetic fields which is qualitatively different from the B = 0 case. Our data strongly suggest an Anderson transition for B ≠ 0 corresponding to a non-algebraic zero of the β-function which can be excluded safely for the zero field case. An estimation of the critical exponent shows good agreement with a previous result obtained for the divergence of the localisation length in the middle of the first Landau band, thus supporting universality. © 1990.

引用

页码：855 / 857

页数：3

共 23 条

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