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This Week at Physics

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Event Number 1520

  Friday, October 2nd, 2009

Physics Department Colloquium
Search for Time-Reversal-Symmetry-Breaking Effects in Unconventional Superconductors
Time: 4:00 pm
Place: 2241 Chamberlin Hall (coffee and cookies at 3:30 pm)
Speaker: Aharon Kapitulnik, Stanford University
Abstract: BCS theory of conventional superconductivity can be described by a condensate of Cooper-pairs of time-reversed states. Such superconductors respect time reversal symmetry and are immune against non-magnetic scattering (the Anderson theorem). However, for unconventional superconductors, which do not respect Anderson theorem, there can be a class of superconductors with "chiral" order parameter for which time-reversal symmetry is broken (TRSB). In this talk we will review our recent studies of TRSB in several systems, emphasizing possible triplet superconductors such as Sr2RuO4, the study of the pseudogap state of high temperature superconductors, and the inverse proximity effect in superconductor/ferromagnet bilayer structures.

For a recent review of our studies see: Aharon Kapitulnik, Jing Xia, Elizabeth Schemm and Alexander Palevski, New J. Phys. 11 (2009) 055060.
Host: Chubukov
Poster: http://www.physics.wisc.edu/twap/posters/2009/1520.pdf
Video: http://www.physics.wisc.edu/vod/2009/10/02.html
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