Universal crossover in variable range hopping with Coulomb interactions

Amnon Aharony, Youzhu Zhang, M. P. Sarachik

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

Using dimensional analysis, we show that the variable-range-hopping resistivity of disordered systems with Coulomb interactions obeys the scaling form ln(/0)=Af(T/Tx), where f(x) is a universal function and A and Tx 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 (fx-1/4) to the Efros-Shklovskii (fx-1/2) behaviors. Data on five different samples of compensated n-type CdSe are shown to collapse onto this single function.

Original languageEnglish
Pages (from-to)3900-3903
Number of pages4
JournalPhysical Review Letters
Volume68
Issue number26
DOIs
StatePublished - 1 Jan 1992
Externally publishedYes

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