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Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 98: Poster Session: Superconductivity

TT 98.20: Poster

Thursday, March 15, 2018, 15:00–19:00, Poster B

Triplet superconducting correlations and spin imbalance in magnet-superconductor hybrid structures — •Kevin Marc Seja1, Oleksii Shevtsov2, and Tomas Löfwander11Chalmers University of Technology, Göteborg, Sweden — 2Northwestern University, Evanston, IL, United States

We examine a superconductor that is in contact with a normal metal via a spin-active interface. Using quasiclassical theory of superconductivity, we study the system in equilibrium as well as in nonequilibrium induced by a voltage bias. Earlier investigations have shown that in equilibrium the interface gives rise to Andreev bound states that induce a spin magnetization in the superconductor. It was found that this equilibrium magnetization is related to non-trivial triplet superconducting correlations, a key feature of unconventional superconductivity. Out of equilibrium there is an additional contribution to spin imbalance related to spin-filtering and spin-mixing mechanisms. [1,2] However, in non-equilibrium the possible connection between magnetization and superconducting triplet correlations is not yet understood. The aim of this work is to examine this relation as well as the change in distribution and the spatial behavior of these correlations in non-equilibrium configurations.
O. Shevtsov, T. Löfwander, J. Phys Conf. Ser. 568 2 (2014)
O. Shevtsov, T. Löfwander, Phys. Rev. B. 90 085432 (2014)

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