Variable range hopping as the mechanism of the conductivity peak broadening in the quantum Hall regime

D. G. Polyakov, Boris I Shklovskii

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Abstract

We argue that it is the hopping transport that is responsible for broadening of the σxx peaks. An explicit expression for the width Δν of the peak as a function of the temperature T is found. A close relation between the characteristic temperature in the dependence Δν on T and that in the variable-range-hopping exponent at an integer ν is established. Broadening of the peak with increasing current is also explained. The current J is shown to act like the effective temperature TeffJ1/2 if TeffT. The anomalous behavior of two peaks which are close to each other (spin split, e.g.) is considered.

Original languageEnglish (US)
Pages (from-to)3796-3799
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number24
DOIs
StatePublished - Jan 1 1993

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