Publication: Anisotropic superconductors containing transition-metal impurities: Local spin fluctuations
Issued Date
1986-01-01
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ISSN
01631829
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2-s2.0-30244432256
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Mahidol University
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SCOPUS
Bibliographic Citation
Physical Review B. Vol.33, No.11 (1986), 7575-7582
Suggested Citation
I. M. Tang Anisotropic superconductors containing transition-metal impurities: Local spin fluctuations. Physical Review B. Vol.33, No.11 (1986), 7575-7582. doi:10.1103/PhysRevB.33.7575 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/9878
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Title
Anisotropic superconductors containing transition-metal impurities: Local spin fluctuations
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Abstract
The effects of transition-metal (TM) impurities on the transition temperature of an anisotropic superconductor when the TM impurities give rise to local spin fluctuations (LSFs) are studied. The effective electron-electron interaction between the Cooper-pair electrons is taken to be the sum of a separable anisotropic electron-phonon potential and the repulsive Coulomb potential existing between the electrons. The multiplicative renormalization technique is used to treat the Coulomb repulsion between the d electrons of opposite spins which localize about an impurity site. It is found that the LSFs influence the anisotropic superconductors in two ways. They cause a decrease in the anisotropy and an increase in the Coulomb pseudopotential. Numerical calculations of the decrease in Tc are carried out using parameters appropriate to the dilute AlMn superconductors. © 1986 The American Physical Society.