UNIVERSAL CROSSOVER IN VARIABLE RANGE HOPPING WITH COULOMB INTERACTIONS

被引：121

作者：

AHARONY, A ^{[1
]}

ZHANG, YZ ^{[1
]}

SARACHIK, MP ^{[1
]}

机构：

[1] CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.68.3900

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using dimensional analysis, we show that the variable-range-hopping resistivity-rho of disordered systems with Coulomb interactions obeys the scaling form ln(rho/rho-0) = Af(T/T(x)), where f(x) is a universal function and A and T(x) are sample-dependent constants. A simple heuristic calculation in three dimensions yields an explicit form for f(x), which exhibits a smooth crossover from the Mott (f is-proportional-to x-1/4) to the Efros-Shklovskii (f is-proportional-to x-1/2) behaviors. Data on five different samples of compensated n-type CdSe are shown to collapse onto this single function.

引用

页码：3900 / 3903

页数：4

共 11 条

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