Effects of In-Plane Impurity Substitution in Sr2RuO4

Abstract

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.

arXiv comment4 pages, 2 figures. submitted to Journal of the Physical Society of Japan

References in corpus (5)

• Evidence for incommensurate spin fluctuations in Sr_2RuO_4
• Predictions for Impurity-Induced Tc Suppression in the High-Temperature Superconductors
• Normal State Magnetic Properties of Ni and Zn Substituted in YBa_{2}Cu_{3} O_{6+x}: Hole-Doping Dependence
• Incommensurate magnetic ordering in Sr_2Ru_(1-x)Ti_xO_4
• Magnetic ordering in Sr2RuO4 induced by nonmagnetic impurities

Cited by in corpus (9)

• Improved Single-Crystal Growth of Sr${}_2$RuO${}_4$
• Rigid-Band Shift of the Fermi Level in a Strongly Correlated Metal: Sr(2-y)La(y)RuO(4)
• Multi-component order parameter superconductivity of Sr${}_2$RuO${}_4$ revealed by topological junctions
• Surface and bulk electronic structure of unconventional superconductor Sr_2RuO_4: unusual splitting of the beta-band
• Low-Temperature Hall Effect in Substituted Sr2RuO4
• The Effect of Magnetic Impurities on Superfluid ${}^3$He in Aerogel
• Impurity effect as a probe of the paring symmetry in BiS_{2} based superconductors
• Time-reversal symmetry breaking from lattice dislocations in superconductors
• Multipolar Fermi Surface Deformations in Sr${}_2$RuO${}_4$ Probed by Resistivity and Sound Attenuation: A Window into Electron Viscosity and the Collision Operator