Effect of Transition Metal Impurities on Superconductivity
作者： Shigeru Takayanagi , Tadashi Sugawara
DOI: 10.1143/JPSJ.38.718
关键词: Impurity 、 Superconductivity 、 Transition metal 、 Excited state 、 Condensed matter physics 、 Anderson impurity model 、 Metal 、 Statistical physics 、 Physics 、 Alloy 、 General Physics and Astronomy
摘要: The existing experimental results on the effect of transition metal impurities superconductivity in several alloy systems were compared with theories based two different models, Anderson model and s-d model. It was found that theory Muller-Hartmann Zittartz (s-d model) reproduces Kondo alloys \(T_{\text{K}}/T_{\text{co}}{\lesssim}1\) fairly well if T K is replaced by /10, where temperature co critical host metal. also thermodynamic quantities at =0 fit Shiba (Anderson remarkably well. From observed variation position localized excited states gap / , it inferred from pair breaking behavior to nonmagnetic BCS takes place rather abruptly about ≈80.
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