TY - JOUR
T1 - Nonequilibrium dephasing in two-dimensional indium oxide films
AU - Ovadyahu, Z.
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0001762587&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.63.235403
DO - 10.1103/PhysRevB.63.235403
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AN - SCOPUS:0001762587
SN - 1098-0121
VL - 63
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 23
ER -