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Dynamical susceptibility of impurity electrons described by the Anderson model

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Abstract

The dynamical susceptibility of impurity electrons is studied for the symmetric single-orbital Anderson model. The present theory is based on a perturbation expansion in terms ofU, the interaction between impurityd electrons. The result shows how the impurity spin fluctuation peak is developed with increase ofU in the imaginary part of the dynamical susceptibility. The temperature dependence of the impurity nuclear spin-lattice relaxation time is also studied. Deviations from the Korringa relation are demonstrated for elevated temperatures, while the relation is satisfied forT≪T K (the Kondo temperature). The Götze-Schlottmann theory is discussed in connection with the present calculation.

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Authors and Affiliations

  1. Institute for Solid State Physics, University of Tokyo, Roppongi, Tokyo, Japan

    Hiroyuki Shiba

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  1. Hiroyuki Shiba
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Shiba, H. Dynamical susceptibility of impurity electrons described by the Anderson model. J Low Temp Phys 25, 587–599 (1976). https://doi.org/10.1007/BF00657285

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  • DOI: https://doi.org/10.1007/BF00657285

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