Experimental observation of the selection rule in Josephson coupling between In and Sr2RuO4

R. Jin, Y. Liu, Z. Q. Mao, Y. Maeno

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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 languageEnglish (US)
Pages (from-to)341-347
Number of pages7
JournalEurophysics Letters
Issue number3
StatePublished - Aug 1 2000


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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