VARIABLE-RANGE-HOPPING AS THE MECHANISM OF THE CONDUCTIVITY PEAK BROADENING IN THE QUANTUM HALL REGIME

被引：117

作者：

POLYAKOV, DG ^{[1
]}

SHKLOVSKII, BI ^{[1
]}

机构：

[1] AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.70.3796

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We argue that it is the hopping transport that is responsible for broadening of the sigma(xx) peaks. An explicit expression for the width DELTAnu of the peak as a function of the temperature T is found. A close relation between the characteristic temperature in the dependence DELTAnu on T and that in the variable-range-hopping exponent at an integer nu is established. Broadening of the peak with increasing current is also explained. The current J is shown to act like the effective temperature T(eff) is-proportional-to J1/2 if T(eff) >> T. The anomalous behavior of two peaks which are close to each other (spin split, e.g.) is considered.

引用

页码：3796 / 3799

页数：4

共 33 条

[1]

ALTSHULER BL, 1985, ELECTRON ELECTRON IN

[2] EDGE AND BULK LANDAU STATES IN QUANTUM HALL REGIME [J].