Non-Magnetic Resonance Scattering in Two-Band Superconductors
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概要
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The Anderson model extended to two overlapping bands is used to investigate the effect of ferromagnetic transition-metal impurities on superconductors of some transition metals due to non-magnetic resonance scattering. The initial change in the superconducting critical temperature T_c is calculated. The results are very similar to those obtained in a previous paper, i.e. T_c is found to increase linearly with the impurity concentration for α>1 and, of course, to decrease linearly with the concentration for α<1, respectively. Here α is a certain parameter given by a previous paper. However, one may expect that non-magnetic resonance scattering has a remarkably large effect as in the one-band model. The correlation effect among the localized electrons is found to be very small in comparison with the influence of non-magnetic resonance scattering in contrast to our expectations in the one-band model. Finally we may say that the influence of the non-magnetic impurity scattering is very important because it reflects the more precise nature of superconductivity of some transition metals.
- 理論物理学刊行会の論文
- 1971-05-25
著者
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Kusakabe Takashi
Department Of Orthopaedic Surgery Tohoku University School Of Medicine
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Kusakabe Takashi
Department Of Neuropsychiatry Fukushima Medical University School Of Medicine
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KUSAKABE Takashi
Department of Physics, Tokyo University of Education
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