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Spin-orbit coupling fields in hybrid ferromagnet/semiconductor heterostructures

Seminar Friday, 17/05/2013 10:00 - 11:00

Speakers: Alex Matos–Abiague (Universität Regensburg, Německo)
Place: Meeting room -- Building A, Institute of Physics ASCR, Cukrovarnická 10, Praha 6.
Presented in English
Organisers: Department of Spintronics and Nanoelectronics

The microscopic structure of spin-orbit fields at interfaces such as Fe/GaAs is uncovered from first principles. A symmetry based me- thod allows obtaining the spin-orbit fields — both their magnitude and orientation — for a generic Bloch state, from the electronic band structure for any in-plane magnetization orientation. It is demonstrated that the spin-orbit fields depend not only on the electric field across the interface, but also surprisingly strongly on the Fe magnetization orien- tation. The possible formation of helical interface states due to strong spin-orbit fields at nonmagnetic interfaces is also briefly discussed.

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