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SUMMARY:Pairing symmetry and dominant band in Sr2RuO4 - Thomas Scaffidi\, 
 University of Oxford
DTSTART:20140206T141500Z
DTEND:20140206T151500Z
UID:TALK49564@talks.cam.ac.uk
CONTACT:Gareth Conduit
DESCRIPTION:We study the superconductivity pairing mechanism in Sr2RuO4 in
  the limit of small interaction by extending a renormalization group calcu
 lation developed by Raghu et al. [Phys. Rev. B 81\, 224505 (2010)] to incl
 ude spin-orbit coupling and multi-band effects. We show these effects to b
 e crucial to discriminate between the possible order parameters. In contra
 st to previous results and without the necessity of fine-tuning\, we obtai
 n pseudo-spin triplet gaps of the same order of magnitude on the two-dimen
 sional gamma band and the quasi-one-dimensional alpha and beta bands. The 
 ratio of the gap amplitude on the different bands varies continuously with
  the interaction parameter. The favoured pairing symmetry is shown to be c
 hiral when gamma is slightly dominant and helical when alpha and beta are 
 slightly dominant.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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