Kondo effect in systems with spin disorder

Igor E. Smolyarenko, Ned S. Wingreen

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

We consider the role of static disorder in the spin sector of the one- and two-channel Kondo models. The distribution functions of the disorder-induced effective energy splitting between the two levels of the Kondo impurity are derived to the lowest order in the concentration of static scatterers. It is demonstrated that the distribution functions are strongly asymmetric, with the typical splitting being parametrically smaller than the average rms value. We employ the derived distribution function of splittings to analyze the temperature dependence of the low-temperature conductance of a sample containing an ensemble of two-channel Kondo impurities. The results are used to analyze the consistency of the two-channel Kondo interpretation of the zero-bias anomalies observed in Cu/(Si:N)/Cu nanoconstrictions.

Original languageEnglish (US)
Pages (from-to)9675-9689
Number of pages15
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number13
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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