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TT: Fachverband Tiefe Temperaturen

TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session

TT 33.55: Poster

Mittwoch, 28. März 2012, 15:00–19:00, Poster B

Transport through Andreev bound states in a triplet superconductor - ferromagnet - singlet superconductor Josephson junction — •Wei Chen¹, Philip M. R. Brydon², Yasuhiro Asano³, and Dirk Manske¹ — ¹Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart — ²Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden — ³Department of Applied Physics, Hokkaido University, Sapporo, 060-8628, Japan

We use microscopic Bogoliubov-de Gennes theory to study a model triplet superconductor - ferromagnet - singlet superconductor Josephson junction. We obtain analytic expressions for the Andreev bound state spectrum, and hence calculate the free energy minimum of the junction, and the spontaneous charge and spin currents. We find that these properties of the junction strongly depend upon the orbital pairing state of the two superconductors. The results are interpreted with the assistance of a tunneling Hamiltonian theory.