Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

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

TT 33.56: Poster

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

Proximity effects at the interface between chiral p-wave superconductors and ferromagnets — •Damien Terrade¹, Mario Cuoco², Paola Gentile², and Dirk Manske¹ — ¹Max Planck Institute For Solid State Research, Stuttgart, Germany — ²CNR-SPIN, Fisciano (Salerno), Italy

We focus on an interface along the (001) direction. The system is made by a stack of two-dimensional layers, with a d^→-vector perpendicular to the plane, which should be the first experimental configuration of the predicted Josephson junctions involving component like Sr₂RuO₄. The SC is described with an extended Hubbard model and the ferromagnetism is based either on a Stoner-like model [1,2] or on a change in the relative bandwidth of electrons for the two different spin polarizations[3]. We compute self-consistently the pairing potentials, the magnetization and the free energy as a function of the exchange field strength as well as the angle between the exchange field and the d^→-vector. We have generalized the work done in [3] by including spin-flip process and magnetic impurities at the interface as well as a temperature dependence. We obtain in the FM layers no induced singlet components unlike interface along the (100) direction and strongly reduced oscillations for the triplet components.
K. Kuboki. J. Phys. Soc. Jap. 70, 9 (2001).
B. M.Andersen, et al. Phys. Rev. B 77, 054501 (2008).
M. Cuoco, et al. Phys. Rev. B 78, 054503 (2008).