Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 49: Poster Session: Superconductivity
TT 49.21: Poster
Wednesday, April 3, 2019, 15:00–18:30, Poster D
Triplet superconducting correlations: Magnet-superconductor hybrid structures in nonequilibrium — •Kevin Marc Seja1, Oleksii Shevtsov2, and Tomas Löfwander1 — 1Chalmers 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 supercon-
ductor. 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. We examine
this relation, the change in distribution as well as the structure and spatial
behavior of these correlations in non-equilibrium configurations.
Shevtsov O and Löfwander T, J. Phys Conf. Ser. 568, 2 (2014)
Shevtsov O and Löfwander T, Phys. Rev. B 90, 085432 (2014)