Effects of In-Plane Impurity Substitution in Sr2RuO4

Details Effects of In-Plane Impurity Substitution in Sr2RuO4 Effects of In-Plane Impurity Substitution in Sr2RuO4

2002-10-09

arxiv.org/abs/cond-mat/0210190v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures. submitted to Journal of the Physical Society of Japan

Scientific paper

10.1143/JPSJ.72.237

We report comparative substitution effects of nonmagnetic Ti^(4+) and magnetic Ir^(4+) impurities for Ru^(4+) in the spin-triplet superconductor Sr2RuO4. 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 Sr2RuO4. 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 Sr2RuO4 act as strong potential scatterers, similar to the nonmagnetic Zn^(2+) impurity in the high-Tc cuprates.

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