The spin galvanic effect (SGE) describes the conversion of a nonequilibrium spin polarization into a transverse charge current. Recent experiments have demonstrated a large conversion efficiency for the two-dimensional electron gas formed at the interface between two insulating oxides, LaAlO3 and SrTiO3. Here, we analyze the SGE for oxide interfaces within a three-band model for the Ti t2g orbitals which displays an interesting variety of effective spin-orbit couplings in the individual bands that contribute differently to the spin-charge conversion. Our analytical approach is supplemented by a numerical treatment where we also investigate the influence of disorder and temperature, which turns out to be crucial to providing an appropriate description of the experimental data.

Seibold, G., Caprara, S., Grilli, M., Raimondi, R. (2017). Theory of the Spin Galvanic Effect at Oxide Interfaces. PHYSICAL REVIEW LETTERS, 119(25), 256801 [10.1103/PhysRevLett.119.256801].

Theory of the Spin Galvanic Effect at Oxide Interfaces

Raimondi, Roberto
2017-01-01

Abstract

The spin galvanic effect (SGE) describes the conversion of a nonequilibrium spin polarization into a transverse charge current. Recent experiments have demonstrated a large conversion efficiency for the two-dimensional electron gas formed at the interface between two insulating oxides, LaAlO3 and SrTiO3. Here, we analyze the SGE for oxide interfaces within a three-band model for the Ti t2g orbitals which displays an interesting variety of effective spin-orbit couplings in the individual bands that contribute differently to the spin-charge conversion. Our analytical approach is supplemented by a numerical treatment where we also investigate the influence of disorder and temperature, which turns out to be crucial to providing an appropriate description of the experimental data.
Seibold, G., Caprara, S., Grilli, M., Raimondi, R. (2017). Theory of the Spin Galvanic Effect at Oxide Interfaces. PHYSICAL REVIEW LETTERS, 119(25), 256801 [10.1103/PhysRevLett.119.256801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/326741
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