EXPONENTS FOR ELECTRICAL-CONDUCTIVITY IN DISORDERED MATERIALS

被引：10

作者：

FREED, KF

机构：

[1] James Franck Institute, University of Chicago, Chicago

来源：

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS | 1979年 / 12卷 / 01期

关键词：

D O I：

10.1088/0022-3719/12/1/005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Scaling relations are established for the density of states n(E) and the electrical conductivity sigma (E) for an electron in the presence of dense, weak, random scatterers. Near the mobility edge Ec, the problem scales to one of large potential fluctuations. Four dimensions produce singularities. Exponents are obtained for the dependence of n(Ec) on mass and potential fluctuations. Bounds on sigma (E) exponents are consistent with possible minimum metallic conductivity for d=2 but not d=3.

引用

页码：L17 / L21

页数：5

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