Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Spin dependent Transport Phenomena
MA 35.11: Vortrag
Mittwoch, 9. März 2016, 17:45–18:00, H33
Interfacial spin-orbit fields in ferromagnet/normal metal (FN) and ferromagnet/superconductor (FS) systems — •Petra Högl1, Alex Matos-Abiague2, Igor Zutic2, and Jaroslav Fabian1 — 1University of Regensburg, Germany — 2University at Buffalo, State University of New York, USA
Breaking of space-inversion symmetry at interfaces induces spin-orbit fields as an emergent phenomenon. Interfacial spin-orbit fields are believed to enable a wealth of new phenomena, not existent or fragile in the bulk, such as the tunneling anisotropic magnetoresistance (TAMR), interfacial spin-orbit torques, Skyrmions, or possible realization of topological superconductors. We theoretically investigate spin-polarized transport in FN and FS junctions in the presence of Rashba and Dresselhaus interfacial spin-orbit fields. The interplay of magnetism and spin-orbit fields leads to a marked magnetoanisotropy of the conductances. Remarkably, the anisotropy in FS systems–magnetoanisotropic Andreev reflection (MAAR)–is giant compared to TAMR, its normal-state counterpart in FN junctions [1]. We further report on the dependence of spin-flip probability currents on characteristic system parameters [2]. This work has been supported by DFG SFB 689, Int. Doct. Prog. Top. Insulators of Elite Network of Bavaria, DOE-BES Grant No. DE-SC0004890, and ONR N000141310754.
[1] P. Högl, A. Matos-Abiague, I. Žutić, J. Fabian, Phys. Rev. Lett. 115, 116601 (2015)
[2] A. M. Kamerbeek, P. Högl, J. Fabian, T. Banerjee, Phys. Rev. Lett. 115, 136601 (2015)