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) ∝ J 1 2 if Teff(J){A figure is presented}T. Broadening of the ohmic ac-conductivity peaks with frequency ω is found to be determined by the effective temperature Teff(ω)∼h {combining short stroke overlay}ω.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 476-482 |
| Number of pages | 7 |
| Journal | Physica A: Statistical Mechanics and its Applications |
| Volume | 200 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - Nov 15 1993 |
Bibliographical note
Funding Information:We are gratefult o H.P. Wei for stimulatingd iscussionsa nd to L.W. Engel for providing us with the experimentald ata [27]. This work was supportedb y the National Science Foundation under Grant No. DMR-9020587.
