Free magnetic moments in disordered metals

    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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