The Kondo problem in superconductors is studied by extending Wilson's numerical renormalization group method. As a continuation to a previous paper (J. Phys. Soc. Jpn. 61 (1992) 3239), various problems related to the localized excited state produced by a magnetic impurity are examined in detail. In particular, the binding energy of the localized excited state, its spectral weight, one-electron and magnetic excitation spectra and the spatial variation of the order parameter are studied over the whole regime of the magnitude of T K /Δ ( T K : Kondo temperature, Δ: superconducting energy gap).
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Sakai et al. (1993) studied this question.
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