Effects of In-Plane Impurity Substitution in Sr_2RuO_4
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概要
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We report comparative substitution effects Ti^<4+> and magnetic Ir^<4+> impurities for Ru^<4+> in the spin-triplet superconductor Sr_2RuO_4. We found that both impurities suppress the superconductivity completely at a concentration of approximately 0.15%, reflecting the high sensitivity to translational symmetry breaking in Sr_2RuO_4. In addition, a rapid enhancement of residual resistivity is in quantitative agreement with unitarity-limit scattering. Our result suggests that both nonmagnetic and magnetic impurities in Sr_2RuO_4 act as strong potential scatterers. The behavior observed in Sr_2RuO_4 is similar to that of the nonmagnetic (Zn^<2+>) impurity in the high-T_c cuprates, but different from that of the magnetic (Ni^<2+>) impurity.
- 社団法人日本物理学会の論文
- 2003-02-15
著者
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MAENO Yoshiteru
Department of Physics, Graduate School of Science, Kyoto University
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Kikugawa Naoki
Department Of Quantum Matter Adsm Hiroshima University
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Kikugawa Naoki
Venture Business Laboratory Kyoto University : Separtment Of Physics Kyoto University
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Mackenzie A
Univ. St. Andrews Gbr
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Maeno Yoshiteru
Department Of Physics Faculty Of Science Hiroshima University
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Mackenzie Andrew
School Of Physics And Astronomy University Of St Andrews
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