Effects of in-plane impurity substitution in Sr2RuO4

N Kikugawa, Andrew Peter Mackenzie, Y Maeno

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We report comparative substitution effects of nonmagnetic Ti4+ and magnetic Ir4+ impurities for Ru4+ 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. The behavior observed in Sr2RuO4 is similar to that of the nonmagnetic (Zn2+) impurity in the high-T-c cuprates, but different from that of the magnetic (Ni2+) impurity.

Original languageEnglish
Pages (from-to)237-240
Number of pages4
JournalJournal of the Physical Society of Japan
Volume72
Issue number2
DOIs
Publication statusPublished - Feb 2003

Keywords

  • Sr2RuO4
  • spin-triplet superconductivity
  • impurity effects
  • unitarity scattering
  • TRIPLET SUPERCONDUCTOR SR2RUO4
  • LAYERED PEROVSKITE
  • TRANSITION
  • NI
  • BI2SR2CACU2O8+DELTA
  • TEMPERATURE
  • SUPPRESSION
  • DEPENDENCE
  • ATOMS
  • UPT3

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