Nonequilibrium dephasing in two-dimensional indium oxide films

Z. Ovadyahu

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We report on results of resistance R and magnetoresistance in diffusive indium oxide films measured down to (formula presented) Analyzing the data using weak-localization theory shows that the phase-coherent time (formula presented) increases without bound as (formula presented) However, this result is obtained only when the voltage applied to the sample (formula presented) is sufficiently small. When (formula presented) is not small, (formula presented) may appear to “saturate” while R continues to increase as (formula presented) Possible reasons for this intriguing behavior are discussed. It is argued that in out-of-equilibrium situations (formula presented) and (formula presented) need not behave similarly. We suggest a heuristic picture, involving two-level systems, which might be consistent with our observations.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number23
DOIs
StatePublished - 2001

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