Conductivity peaks in the quantum Hall regime: Broadening with temperature, current, and frequency

D. G. Polyakov, B. I. Shklovskii

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We argue that it is hopping transport that is responsible for broadening of the σxx peaks in low-mobility samples. Explicit expressions for the width Δν of a peak as a function of the temperature T, current J, and frequency ω are found. It is shown that Δv grows with T as ( T T1)K, where k is the inverse localization-length exponent. The current J is shown to act like an effective temperature Teff(J) α J 1 2 if Teff(J) ≫ T. Broadening of the oh peaks with frequency ω is found to be determined by the effective temperature Teff(ω) ≈ ℏω kB.

Original languageEnglish (US)
Pages (from-to)151-155
Number of pages5
JournalSurface Science
Volume305
Issue number1-3
DOIs
StatePublished - Mar 20 1994

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