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Theory of the Spin Galvanic Effect at Oxide Interfaces

  • 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.

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Author: Götz SeiboldORCiD, Sergio CapraraORCiD, Marco GrilliORCiD, Roberto Raimondi
URL:https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.256801
DOI:https://doi.org/10.1103/PhysRevLett.119.256801
ISSN:1092-0145
Title of the source (English):Physical Review Letters
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2017
Tag:Spin polarization; Spin-orbit coupling; Spintronics; Two-dimensional electron gas
Volume/Year:119
Issue number:25
Article number:ID 256801
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics
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