Universal distribution of Kondo temperatures in dirty metals.
Kondo screening of diluted magnetic impurities in a disordered host is studied analytically and numerically in one, two, and three dimensions. It is shown that in the T(K) --> 0 limit the distribution of Kondo temperatures has a universal form P(T(K)) approximately T(K) (-a) that holds in the insulating phase and persists in the metallic phase close to the metal-insulator transition. Moreover, the exponent depends only on the dimensionality. The most important consequence of this result is that the T dependence of thermodynamic properties is smooth across the metal-insulator transition in three dimensional systems.
Cornaglia
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PS
CEA-Saclay, DSM/DRECAM/SPCSI, Bâtiment 462, F-91191 Gif-sur-Yvette, France.
Grempel
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DR
Balseiro
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CA