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1997 | 92 | 6 | 1109-1115
Article title

Possible Long Time Tails in Current-Current Correlation Function for Two-Dimensional Electron Gas in Random Magnetic Field

Content
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Languages of publication
EN
Abstracts
EN
We consider a two-dimensional degenerate electron gas in the presence of perpendicular random magnetic field. The magnetic field disorder which is assumed to be Gaussian is characterized by two parameters. The first is proportional to the amplitude of local magnetic field fluctuations. The second one characterizes the disorder on the longer scale - we call it the screening length. Using the Kubo formula for the conductivity we have found a class of diagrams which leads to the long time tails in the current-current correlation function. For short times in comparison with the diffusion time corresponding to the screening length this function behaves like logarithm of time, for longer times it decays like t^{-1} which of course brings into question the diffusive character of the behavior of the charged particle in random magnetic field widely assumed in the literature.
Keywords
EN
Year
Volume
92
Issue
6
Pages
1109-1115
Physical description
Dates
published
1997-12
received
1997-08-07
References
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv92z602kz
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