Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor Junctions

2015/02/28 by Petra Högl, Alex Matos-Abiague, Igor Žutić +1
Physics and Astronomy · #Andreev reflection #Ballistic conduction #Condensed matter physics #Conductance #Electron #Ferromagnetism #Magnetic field #Magnetic properties of thin films #Magnetization #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Reflection (computer programming) #Spectroscopy #Spin (aerodynamics) #Spin polarization #Superconductivity #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.115.116601

published as Phys. Rev. Lett. 115, 116601 (2015) · Pages 6-10 contain supplemental material

openalex publication_date 2015/09/10 · arxiv created 2015/09/23 · arxiv updated 2015/09/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Andreev reflection spectroscopy of ferromagnet-superconductor (FS) junctions [corrected] 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 a FS junction.

Citations

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