MAGNETIC-FIELD DEPENDENCE OF THE QUANTUM-HALL-LIQUID INSULATOR TRANSITION

被引：16

作者：

ALPHENAAR, BW

WILLIAMS, DA

机构：

[1] Hitachi Cambridge Laboratory, Cavendish Laboratory, Cambridge CB3 0HE, Madingley Road

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.50.5795

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements of the magnetic field dependence of the insulator transition in a gated AlxGa1-xAs/GaAs heterostructure. The resulting phase diagram shows reentrant behavior as the magnetic length decreases below the zero-field electron mean free path. By fitting our data to a predicted phase diagram, we obtain a value for the localization length exponent governing the quantum-Hall-liquid-insulator transition. As has been recently suggested, this value is in agreement with that determined for the critical exponent between quantum Hall plateaus.

引用

收藏

页码：5795 / 5798

页数：4

相关论文

共 17 条

[1] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].

ANDO, T ;

FOWLER, AB ;

STERN, F .

REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672

[2]

[Anonymous], 1990, METAL INSULATOR TRAN

[3] CRITICAL LOCALIZATION IN 2-DIMENSIONAL LANDAU QUANTIZATION [J].

AOKI, H ;

ANDO, T .

PHYSICAL REVIEW LETTERS, 1985, 54 (08) :831-834

[4] ONE-PARAMETER SCALING IN THE LOWEST LANDAU BAND - PRECISE DETERMINATION OF THE CRITICAL-BEHAVIOR OF THE LOCALIZATION LENGTH [J].

HUCKESTEIN, B ;

KRAMER, B .

PHYSICAL REVIEW LETTERS, 1990, 64 (12) :1437-1440

[5]

HUGHES RK, UNPUB

[6] OBSERVATION OF MAGNETIC-FIELD-INDUCED DELOCALIZATION - TRANSITION FROM ANDERSON INSULATOR TO QUANTUM HALL CONDUCTOR [J].

JIANG, HW ;

JOHNSON, CE ;

WANG, KL ;

HANNAHS, ST .

PHYSICAL REVIEW LETTERS, 1993, 71 (09) :1439-1442

[7]

KHMELNITSKII DE, 1983, JETP LETT+, V38, P552

[8] GLOBAL PHASE-DIAGRAM IN THE QUANTUM HALL-EFFECT [J].

KIVELSON, S ;

LEE, DH ;

ZHANG, SC .

PHYSICAL REVIEW B, 1992, 46 (04) :2223-2238

[9] SIZE-DEPENDENT ANALYSIS OF THE METAL-INSULATOR-TRANSITION IN THE INTEGRAL QUANTUM HALL-EFFECT [J].

KOCH, S ;

HAUG, RJ ;

VONKLITZING, K ;

PLOOG, K .

PHYSICAL REVIEW LETTERS, 1991, 67 (07) :883-886

[10] THEORY OF THE QUANTUM-HALL LIQUID TO INSULATOR TRANSITION [J].

LEE, DH ;

KIVELSON, S ;

ZHANG, SC .

PHYSICAL REVIEW LETTERS, 1991, 67 (23) :3302-3305