Quasi-localization and quasi-mobility edge for light atoms mixed with heavy ones
Jack and Pearl Resnick Institute, Physics Department, Bar Ilan University, 52900 Ramat Gan, Israel
Corresponding author: a email@example.com
Revised: 4 September 2007
Published online: 6 February 2008
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.
PACS: 72.15.Rn – Localization effects (Anderson or weak localization)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008