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TT: Tiefe Temperaturen
TT 10: Superconductivity - Tunneling, Josephson Junctions, SQUIDs
TT 10.12: Talk
Saturday, March 5, 2005, 11:30–11:45, TU H104
Novel Josephson Effect in Triplet Superconductor - Ferromagnet - Triplet Superconductor Junctions — •Boris Kastening1, Dirk K. Morr1,2, Dirk Manske3, and Karl Bennemann1 — 1Institut fuer Theoretische Physik, Freie Universitaet Berlin, 14195 Berlin, Germany — 2Department of Physics, University of Illinois at Chicago, Chicago, IL, U.S.A. — 3Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
We predict a new type of Josephson effect to occur in Triplet Superconductor - Ferromagnet - Triplet Superconductor Josephson junctions. In addition to the dependence of IJ on the phase difference between the superconductors, we show that a novel dependence on the relative orientation between the ferromagnetic moment and the d-vectors describing the superconducting pairing symmetry exists. This dependence can be used to build Josephson switches, in which the Josephson current can either be turned on or off or can be made to exhibit a square-wave oscillation.