Title

Disorder-quenched Kondo effect in mesoscopic electronic systems

Authors

Authors

S. Kettemann;E. R. Mucciolo

Comments

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Abbreviated Journal Title

Phys. Rev. B

Keywords

FERMI-LIQUID BEHAVIOR; WEAK-LOCALIZATION; MAGNETIC-MOMENTS; ALLOYS; TEMPERATURE; STATISTICS; SCATTERING; CROSSOVER; WIRES; METAL; Physics, Condensed Matter

Abstract

Nonmagnetic disorder is shown to quench the screening of magnetic moments in metals-the Kondo effect. The probability that a magnetic moment remains free down to zero temperature is found to increase with disorder strength. Experimental consequences for disordered metals are studied. In particular, it is shown that the presence of magnetic impurities with a small Kondo temperature enhances the electron's dephasing rate at low temperatures in comparison to the clean metal case. It is, furthermore, proven that the width of the distribution of Kondo temperatures remains finite in the thermodynamic (infinite volume) limit due to wave-function correlations within an energy interval of order 1/tau, where tau is the elastic scattering time. When time-reversal symmetry is broken either by applying a magnetic field or by increasing the concentration of magnetic impurities, the distribution of Kondo temperatures becomes narrower.

Journal Title

Physical Review B

Volume

75

Issue/Number

18

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

17

WOS Identifier

WOS:000246890600045

ISSN

1098-0121

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