Regensburg 2007 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 8: Superconductivity - Poster Session
TT 8.25: Poster
Montag, 26. März 2007, 14:00–17:45, Poster A
Electronic Transport in Superconductor-Ferromagnet-Heterostructures — •Dagmar Rall1, Jakob Brauer1, Detlef Beckmann1, and Hilbert v. Löhneysen2,3 — 1Forschungszentrum Karlsruhe, Institut für Nanotechnologie — 2Forschungszentrum Karlsruhe, Institut für Festkörperphysik — 3Physikalisches Institut, Universität Karlsruhe
Electronic transport in nanoscale superconductor-ferromagnet (SF) contacts at very low temperature is studied in order to identify non-local Andreev bound states. The samples consist of two parallel ferromagnetic film strips between superconducting leads. The strips are magnetized to exhibit a magnetic field which discourages direct Andreev reflection at the respective SF - interfaces. However, if the magnatization is antiparallel and the distances sufficiently small, the setup allows for a non-local reflection of the electrons in one strip to holes in the other strips and vice versa. This way, a bound state may form, giving rise to a Josephson current across the junction.