Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 98: Poster Session: Superconductivity
TT 98.20: Poster
Donnerstag, 15. März 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 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 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)