Conductivity peaks broadening in the quantum Hall regime

D.G. Polyakov and B.I. Shklovskii

Physica A: Statistical Mechanics and its Applications, 1993, vol. 200, issue 1, 476-482

Abstract: We argue that it is the hopping transport that is responsible for broadening of the σxx peaks. 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 Δν grows with T as (T/T1)κ, where κ is the inverse localization-length exponent. The current J is shown to act like the effective temperature Teff(J) ∝ J12 if Teff(J)T. Broadening of the ohmic ac-conductivity peaks with frequency ω is found to be determined by the effective temperature Teff(ω)∼h̵ω.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:200:y:1993:i:1:p:476-482

DOI: 10.1016/0378-4371(93)90549-J

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