Abstract
We have carried out experimental studies on the Josephson coupling between a conventional s-wave superconductor (In) and Sr2RuO4 and found that the coupling is allowed in the in-plane direction, but not along the c-axis. This selection rule indicates that the symmetry of superconducting order parameter of Sr2RuO4 is either p-or, alternatively, purely d-wave. If Sr2RuO4 is a p-wave superconductor, as strongly favored by other experimental evidence, our result suggests that the pairing state of Sr2RuO4 is Γ-5, with d(k) = z(kx ± iky), a nodeless state in which the spins of the superconducting electrons lie in the RuO2 planes.
Original language | English (US) |
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Pages (from-to) | 341-347 |
Number of pages | 7 |
Journal | Europhysics Letters |
Volume | 51 |
Issue number | 3 |
DOIs | |
State | Published - Aug 1 2000 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)