Title

Free magnetic moments in disordered metals

Authors

Authors

S. Kettemann;E. R. Mucciolo

Comments

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Abbreviated Journal Title

Jetp Lett.

Keywords

KONDO PROBLEM; SYSTEMS; TEMPERATURE; IMPURITIES; SCATTERING; LATTICES; ALLOYS; STATES; Physics, Multidisciplinary

Abstract

The screening of magnetic moments in metals, the Kondo effect, is found to be quenched with a finite probability in the presence of nonmagnetic disorder. Numerical results for a disordered electron system show that the distribution of Kondo temperatures deviates strongly from the result expected from the random matrix theory. A pronounced second peak emerges for small Kondo temperatures, showing that the probability that magnetic moments remain unscreened at low temperatures increases with disorder. Analytical calculations, taking into account the correlations between eigenfunction intensities, yield a finite width for the distribution in the thermodynamic limit. Experimental consequences for disordered mesoscopic metals are discussed.

Journal Title

Jetp Letters

Volume

83

Issue/Number

6

Publication Date

1-1-2006

Document Type

Article

Language

English

First Page

240

Last Page

245

WOS Identifier

WOS:000237792900005

ISSN

0021-3640

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