Events at Physics
Events on Thursday, June 17th, 2010
- R. G. Herb Condensed Matter Seminar
- Study of proximity-induced triplet correlations in ferromagnetic Josephson junctions
- Time: 10:00 am
- Place: 5310 Chamberlin
- Speaker: Trupti Khaire, Michigan State University
- Abstract: When a Superconductor (S) is placed next to a ferromagnet (F), the electrons from the spin-singlet Cooper pairs enter different spin bands and rapidly lose phase coherence over a short length scale. However, it is predicted that in the presence of magnetic inhomogeneities not only spin-singlet but also long range spin-triplet correlations are generated. The symmetry of these long range spin-triplet correlations is different from the spin-triplet correlations found in strontium ruthenate Sr2RuO4 and in heavy fermion intermetallic compounds. The novelty of spin-triplet correlations studied here lies in the fact that they are odd under time reversal. I will talk about our search of proximity-induced triplet correlations in ferromagnetic Josephson junctions. In particular I will focus on our recent experiment on Co-based Josephson junctions  that have shown strong evidence of these triplet correlations and will explain the experimental considerations that went into designing the peculiar multilayer used in this work.
 T.S. Khaire, M.A. Khasawneh, W.P. Pratt, Jr., and N.O. Birge, Phys. Rev. Lett. 104, 137002 (2010).
- Host: Robert McDermott