2003/04/30 by Hiroshi Shimahara
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.72.1843
published as J. Phys. Soc. Jpn. Vol.72, No.8 (2003) pp.1843-1846. · 4 pages, 2 figures (with jpsj2.cls, ver.1.2), v3:linguistic corrections
arxiv created 2003/06/20 · openalex publication_date 2003/08/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The impurity effects on the transition temperature Tc and the isotope effect are examined in multiband superconductors with magnetic and nonmagnetic impurities, where the effect of Coulomb repulsion is considered. It is shown that an internal transition of the superconducting state is induced by impurity doping, and that the transition is accompanied by a jump of the isotope-effect coefficient alpha. In particular, the transition is illustrated in a system with two electron bands. In some special cases, extended Abrikosov and Gor'kov (AG) equations for Tc and the expressions of the isotope-effect coefficient alpha are obtained. Possible relevance of the present mechanism to the experimental results of Sr2RuO4 is discussed.