by
Prof.Matthias Eschrig(Royal Holloway, University of London)
→
Europe/Stockholm
Nordita West (122:026)
Nordita West (122:026)
Description
During the past 15 years a new field has emerged, which combines superconductivity and spintronics, with the goal to pave a way for new types of devices for applications combining the virtues of both, namely quantum coherence and interference on one side, and spin-selectivity and spin magnetism on the other. The building block of this new "superspintronics" are spin-triplet Cooper pairs, which are generated at the interface between a conventional superconducting and a ferromagnetic material. Non-collinear magnetic inhomogeneity mixes triplet pairs among each other, thus creating long-ranged equal-spin Cooper pairs in the ferromagnet, and non-coplanar inhomogeneity introduces geometric phases giving rise to unusual current phase relations. We discuss under which conditions spin magnetization and spin supercurrents are generated. In diffusive systems, odd-frequency triplet pairing is realised by a complex form of the superconducting proximity effect, establishing an example for this evasive type of order.
