BREAKDOWN OF UNIVERSAL SCALING OF CONDUCTANCE FLUCTUATIONS IN HIGH MAGNETIC-FIELDS

被引：48

作者：

GEIM, AK ^{[1
]}

MAIN, PC ^{[1
]}

BETON, PH ^{[1
]}

EAVES, L ^{[1
]}

BEAUMONT, SP ^{[1
]}

WILKINSON, CDW ^{[1
]}

机构：

[1] UNIV GLASGOW,DEPT ELECTR & ELECT ENGN,GLASGOW G12 8QQ,SCOTLAND

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.69.1248

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied universal conductance fluctuations in the nonlocal magnetoresistance of n+-GaAs wires. The Lee-Stone correlation field DELTA-B(c) increases by a factor of 5 as the magnetic field increases from 0 to 12 T but the amplitude of the fluctuations does not change. It is possible to explain the increase of DELTA-B(c) quantitatively in terms of a variation of the size of the phase coherence length. However, this should also give rise to a large change in the fluctuation amplitude, which is not observed. This implies that the universal scaling of the conductance fluctuations is not valid in high magnetic fields.

引用

页码：1248 / 1251

页数：4

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