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4 November 2016 Magnetoanisotropic Andreev reflection in ferromagnet/superconductor junctions (Conference Presentation)
Petra Hoegl, Alex Matos-Abiague, Igor Zutic, Jaroslav Fabian
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Proceedings Volume 9931, Spintronics IX; 99313W (2016) https://doi.org/10.1117/12.2236831
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
Andreev reflection spectroscopy of ferromagnet/superconductor (F/S) junctions is a sensitive probe of the junction interface as well as the spin polarization. We theoretically investigate spin-polarized transport in F/S 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. This suggests a similar control of the superconducting proximity effect and Majorana states. 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 F/S junction. This work has been supported by DFG SFB 689, the International Doctorate Program Topological Insulators of the Elite Network of Bavaria, DOE-BES Grant DE-SC0004890, and ONR N000141310754. P. H\"{o}gl, A. Matos-Abiague, Igor \v{Z}uti\'c, J. Fabian, Phys. Rev. Lett. 115, 116601 (2015)
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Petra Hoegl, Alex Matos-Abiague, Igor Zutic, and Jaroslav Fabian "Magnetoanisotropic Andreev reflection in ferromagnet/superconductor junctions (Conference Presentation)", Proc. SPIE 9931, Spintronics IX, 99313W (4 November 2016); https://doi.org/10.1117/12.2236831
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KEYWORDS
Reflectance spectroscopy
Spectroscopy
Dielectrics
Spin polarization
Superconductors
Current controlled current source
Spintronics
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