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arXiv · 1502.08022

Magnetoanisotropic Andreev Reflection in Ferromagnet/Superconductor Junctions

Petra Högl·Alex Matos-Abiague·Igor Žutić·Jaroslav Fabian
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Abstract

Andreev reflection spectroscopy of ferromagnet/superconductor (FS) junctions is an important probe of spin polarization. We theoretically investigate spin-polarized transport in FS junctions in the presence of Rashba and Dresselhaus interfacial spin-orbit fields and show that Andreev reflection can be controlled by changing the magnetization orientation. We predict a giant in- and out-of-plane magnetoanisotropy of the junction conductance. If the ferromagnet is highly spin polarized---in the half-metal limit---the magnetoanisotropic Andreev reflection depends universally on the spin-orbit fields only. Our results show that Andreev reflection spectroscopy can be used for sensitive probing of interfacial spin-orbit fields in FS junction.

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Petra Högl, Alex Matos-Abiague, Igor Žutić, Jaroslav Fabian. 2015-02-27. Magnetoanisotropic Andreev Reflection in Ferromagnet/Superconductor Junctions. https://doi.org/10.1103/physrevlett.115.116601

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