Nesta semana o pós-graduando Marcos Henrique Lima de Medeiros, do Grupo Teórico de Materiais, apresentará o artigo: “Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor Junctions” Petra Högl et al. Phys. Rev. Lett. 115, 116601
Dia: 03 de maio, terça-feira, Sala de Seminários José Roberto Leite do Ed. Alessandro Volta (bloco C) – Sala 110, IFUSP, às 12h10
Abstract:
Andreev reflection spectroscopy of ferromagnetsuperconductor (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 spinorbit fields and show that Andreev reflection can be controlled by changing the magnetization orientation. We predict a giant in- and out-ofplane magnetoanisotropy of the junction conductance. If the BIFUSP 2. 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. Link: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.116601
