MAGNETIC-FIELD-INDUCED METAL-INSULATOR-TRANSITION IN 2 DIMENSIONS

被引：137

作者：

WANG, T ^{[1
]}

CLARK, KP ^{[1
]}

SPENCER, GF ^{[1
]}

MACK, AM ^{[1
]}

KIRK, WP ^{[1
]}

机构：

[1] UNIV MINNESOTA,DEPT PHYS,MINNEAPOLIS,MN 55455

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.72.709

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We carried out magnetotransport measurements and scaling analysis to report on a new magnetic-field-induced metal-insulator transition in two dimensions, where the separatrix between insulating and conducting states appears at a critical magnetic field. In the insulating state, a giant magnetoresistance is observed over a wide range of magnetic field. At the transition, the resistance remains nearly constant over two decades of temperature. In the conducting state a quantum Hall plateau is observed at h/2e2. The critical exponent is in agreement with those of similar transitions in the quantum Hall regime, possibly reflecting a symmetry between the delocalization processes in 2D.

引用

页码：709 / 712

页数：4

共 24 条

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