Impurity Bound States and Symmetry of the Superconducting Order Parameter in Sr_2RuO_4

Abstract

Recent experiments on Sr_2RuO_4 have indicated the presence of linear nodes in the superconducting order parameter. Among the possible spin triplet states, 2D p-wave superconductivity with E_u symmetry appears to be inconsistent with the experiments, whereas the 2D f-wave order parameter with B_1g x E_u symmetry turns out to be a more likely candidate. Here it is shown how the quasi-particle bound state wave functions around a single impurity provide a clear signature of the symmetry of the underlying superconducting order parameter.

RevTex, 10 pages with 6 eps figures

References in corpus (5)

• Imaging the Effects of Individual Zinc Impurity Atoms on Superconductivity in Bi2Sr2CaCu2O8+delta
• Spin triplet superconductivity with line nodes in Sr2RuO4
• Identifying the pairing symmetry in the Sr2RuO4 superconductor
• Quasi-Particle Bound States around Impurities in d-wave Superconductors
• Analysis of impurity-induced circular currents for the chiral superconductor Sr_{2}RuO_{4}

Cited by in corpus (4)

• Impurity-induced resonant spinon zero modes in Dirac quantum spin-liquids
• Van Hove Singularity and Superconductivity in Disordered Hubbard Model
• Linear response function around a localized impurity in a superconductor
• Chiral $p-$wave superconductivity in Pb${}_{1-x}$Sn${}_x$Te: signatures from bound-state spectra and wavefunctions