NEGATIVE MAGNETOCONDUCTANCE IN AN ANDERSON INSULATOR WITH STRONG SPIN-ORBIT SCATTERING

被引：28

作者：

HERNANDEZ, P

SANQUER, M

机构：

[1] Service de Physique del'Etat Condensé, Department de Recherche sur l'Etat Condensé, Centre d'Etudes de Saclay

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.68.1402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the magnetoconductance of amorphous Y(x)Si(1-x) samples in the diffusive, barely, and deeply insulating regimes. Application of a magnetic field decreases the localization length-xi in the barely insulating regime where spin-orbit scattering (SOS) is important. In an insulator without SOS, we see an increase of xi, indicating that spin-reversal symmetry and time-reversal symmetry control the magnetoconductance in the barely insulating regime, in contrast with predictions obtained by directed-path approximations.

引用

页码：1402 / 1405

页数：4

共 15 条

[1]

ALTSHULER BL, 1987, SOV SCI REV SECT A, V9, P233

[2]

BOUCHAUD JP, 1991, J PHYS I, V1, P985, DOI 10.1051/jp1:1991181

[3] QUANTUM LOCALIZATION IN AMORPHOUS W-RE ALLOYS [J].

CHAUDHARI, P ;

HABERMEIER, HU .

PHYSICAL REVIEW LETTERS, 1980, 44 (01) :40-43

[4] SPIN-ORBIT SCATTERING AND MAGNETOCONDUCTANCE OF STRONGLY LOCALIZED-ELECTRONS [J].

MEDINA, E ;

KARDAR, M .

PHYSICAL REVIEW LETTERS, 1991, 66 (24) :3187-3190

[5] MAGNETIC-FIELD EFFECTS ON STRONGLY LOCALIZED-ELECTRONS [J].

MEDINA, E ;

KARDAR, M ;

SHAPIR, Y ;

WANG, XR .

PHYSICAL REVIEW LETTERS, 1990, 64 (15) :1816-1819

[6] SPIN-ORBIT SCATTERING FOR LOCALIZED-ELECTRONS - ABSENCE OF NEGATIVE MAGNETOCONDUCTANCE [J].

MEIR, Y ;

WINGREEN, NS ;

ENTINWOHLMAN, O ;

ALTSHULER, BL .

PHYSICAL REVIEW LETTERS, 1991, 66 (11) :1517-1520

[7] OBSERVATION OF CONDUCTANCE FLUCTUATIONS IN LARGE IN2O3-X FILMS [J].

MILLIKEN, FP ;

OVADYAHU, Z .

PHYSICAL REVIEW LETTERS, 1990, 65 (07) :911-914

[8]

NGUEN VL, 1986, JETP LETT+, V43, P44

[9] BROKEN SYMMETRIES AND LOCALIZATION LENGTHS IN ANDERSON INSULATORS - THEORY AND EXPERIMENT [J].

PICHARD, JL ;

SANQUER, M ;

SLEVIN, K ;

DEBRAY, P .

PHYSICAL REVIEW LETTERS, 1990, 65 (14) :1812-1815

[10]

PICHARD JL, 1990, IOP C P, V108

← 1 2 →