Quasi-localization and quasi-mobility edge for light atoms mixed with heavy ones
A mixture of light and heavy atoms is considered. We study the kinetics of the light atoms, scattered by the heavy ones, the latter undergoing slow diffusive motion. In three-dimensional space we claim the existence of a crossover region (in energy), which separates the states of the light atoms with fast diffusion and the states with slow diffusion; the latter is determined by the dephasing time. For the two dimensional case we have a transition between weak localization, observed when the dephasing length is less than the localization length (calculated for static scatterers), and strong localization observed in the opposite case. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008
Volume (Year): 61 (2008)
Issue (Month): 2 (01)
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