Localization in nonchiral network models for two-dimensional disordered wave mechanical systems

被引：11
|
作者：
Freche, P [1 ]
Janssen, M [1 ]
Merkt, R [1 ]
机构：
[1] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.82.149
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Scattering theoretical network models for coherent wave mechanical systems with quenched disorder are investigated. We focus on universality classes for nonchiral two-dimensional systems. The phase diagram in the parameter space of scattering strengths is determined. Models breaking time reversal symmetry contain only one attractive fixed point, that of strong localization. For spin-1/2 systems with time reversal symmetric spin scattering localization-delocalization transitions occur. Multifractal exponents and quasi-one-dimensional localization lengths are calculated numerically and found to be related by conformal invariance. [S0031-9007(98)08127-7].
引用
收藏
页码：149 / 152
页数：4
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