On existence of quantum diffusion of 2-D electrons at the surface |
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Authors: | VE Kravtsov IV Lerner |
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Institution: | Institute of Spectroscopy, Academy of Sciences, 142092, Troitsk, Moscow obl., U.S.S.R. |
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Abstract: | A quantum diffusion of 2-D electrons at a metal substrate has been shown to arise because of surface-bulk interaction via hybridization provided that the surface Fermi momentum has been smaller than the bulk one. The diffusion coefficient D has been found to depend nonmonotonously on sample dimensions L. An initial decrease in D has turned into an increase for sufficiently large L. The minimum in D has nonanalytically depended on the hybridization constant: . The effects predicted have resulted from the instability of the zero-component nonlinear σ-model with respect to inclusion of certain symmetry — breaking terms which have proved to increase under RG transformations. |
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