Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Poster I
MA 20.22: Poster
Dienstag, 19. März 2024, 16:30–19:00, Poster A
Theory of spin polarization of transverse electron currents in ferromagnets — •Ilja Turek1, Alberto Marmodoro2, Sergiy Mankovsky3, and Hubert Ebert3 — 1Institute of Physics of Materials, Czech Acad. Sci., Brno, Czech Rep. — 2Institute of Physics, Czech Acad. Sci., Prague, Czech Rep. — 3Ludwig Maximilians University, Munich, Germany
Motivated by recent theoretical [1] and experimental [2] studies, we discuss selected aspects of the spin Hall effect in ferromagnets. We focus on cases with fixed directions of the applied electric field and of the induced electron current, and investigate the spin polarization of the latter as a function of the direction of magnetization of the ferromagnet. Based on a group-theoretical analysis [3] and on computations for a 2D tight-binding model [1] and for bulk ordered and disordered iron-based systems, we examine the range of validity of a simple formula suggested by Amin et al. [1]. We find that this formula does not contain terms odd with respect to time reversal, which are of various importance in the studied systems.
[1] V. P. Amin et al., Phys. Rev. B 99 (2019) 220405. [2] N. Soya et al., Phys. Rev. Lett. 131 (2023) 076702. [3] M. Seemann et al., Phys. Rev. B 92 (2015) 155138.
Keywords: spin current; Hall effect; ferromagnet