BROKEN SYMMETRIES AND LOCALIZATION LENGTHS IN ANDERSON INSULATORS - THEORY AND EXPERIMENT

被引：131

作者：

PICHARD, JL ^{[1
]}

SANQUER, M ^{[1
]}

SLEVIN, K ^{[1
]}

DEBRAY, P ^{[1
]}

机构：

[1] CEA SACLAY, SERV PHYS SOLIDE & RESONANCE MAGNET, F-91191 GIF SUR YVETTE, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.65.1812

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Extending a random-matrix theory developed earlier, we show that breaking a basic symmetry in an Anderson insulator (e.g., time-reversal symmetry or spin-rotation symmetry) generically yields a multiplication of the localization length by universal factors. Numerical calculations and magnetoconductance measurements in the Mott variable-range-hopping regime confirm that the removal of time-reversal symmetry by a magnetic field yields 2 in the absence of spin-orbit scattering, and 2 in the presence of spin-orbit coupling. © 1990 The American Physical Society.

引用

页码：1812 / 1815

页数：4