pi,pi resonance mode in the superconducting state of Sr2RuO4
The recent finding that the Knight shift drops in the superconducting phase of Sr2RuO4 renders the previously advocated p-wave superconducting symmetry very unlikely and stimulated new theoretical analyses. A dx2-y2 gap distribution has been proposed by several theoretical groups and is consistent with a tunneling study. For this symmetry one does not expect a resonance mode at the nesting position studied so far. Instead we propose to look for the resonance mode appearing at q=(pi,pi) and other q values consistent with the new theoretical analyses.
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JENNI Kevin; M. Braden; SIDIS Yvan and STEFFENS Paul. (2020). pi,pi resonance mode in the superconducting state of Sr2RuO4. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-02-586
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