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Muon-spin rotation measurements of the vortex state in Sr2RuO4: type-1.5 superconductivity, vortex clustering, and a crossover from a triangular to a square vortex lattice

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Author(s)

S. J. Ray, A. S. Gibbs, S. J. Bending, P. J. Curran, E. Babaev, C. Baines, A. P. Mackenzie, S. L. Lee

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Abstract

Muon-spin rotation has been used to probe the vortex state in Sr2RuO4. At moderate fields and temperatures a lattice of triangular symmetry is observed, crossing over to a lattice of square symmetry with increasing field and temperature. At lower fields it is found that there are large regions of the sample that are completely free from vortices which grow in volume as the temperature falls. Importantly this is accompanied by increasing vortex density and increasing disorder within the vortex-cluster-containing regions. Both effects are expected to result from the strongly temperature-dependent long-range vortex attractive forces arising from the multiband chiral-order superconductivity.

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Original languageEnglish
Article number094504
Number of pages6
JournalPhysical Review. B, Condensed matter and materials physics
Volume89
Issue number9
DOIs
Publication statusPublished - 6 Mar 2014

    Research areas

  • Time-reversal symmetry, SR

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