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

摘要

The authors acknowledge the financial support of the EPSRC (Grant No. EP/J01060X). All μSR experiments were carried out courtesy of the Paul Scherrer Institute. E. Babaev was supported by the US NSF CAREER Award No. DMR-0955902 and by the Knut and Alice Wallenberg Foundation through the Royal Swedish Academy of Sciences, Swedish Research Council.