Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 64: Spin Transport and Orbitronics, Spin-Hall Effects I (joint session MA/TT)
TT 64.6: Vortrag
Donnerstag, 21. März 2024, 10:45–11:00, H 2013
Spin and orbital Edelstein effect in a bilayer SrTiO3 system — •Sergio Leiva1, Börge Göbel1, Jürgen Henk1, Ingrid Mertig1, and Annika Johansson2 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany. — 2Max Planck Institute of Microstructure Physics, Halle, Germany
The spin and orbital Edelstein effect have proved promising phenomenons to generate spin and orbital polarization from a charge current in systems without inversion symmetry [1-5]. The present work studies the current-induced spin and orbital magnetization in a SrTiO3/LaAlO3 interface with a tight-binding model and the semiclassical Boltzmann theory. We studied a monolayer, a pseudo-monolayer, and a bilayer system for the STO to replicate experimental data from ARPES. For the bilayer model [6], we compare the orbital effect from the atomic-centered approximation (ACA) and the modern theory of orbital magnetization (MTOM)[7]. We found that the orbital Edelstein effect from ACA is larger than the spin Edelstein effect [5] and the orbital effect from MTOM. This difference between ACA and MTOM shows the relevance of the modern theory for heterostructure systems.
[1] D. Go et al., Sci. Rep. 7, 46742 (2017)
[2] T. Yoda et al., Nano Lett., 18, 916 (2018).
[3] L. Salemi et al., Nat. Commun. 10, 5381 (2019)
[4] D. Hara et al., Phys. Rev. B, 102, 184404 (2020).
[5] A. Johansson et al., Phys. Rev. Research, 3, 013275 (2021).
[6] S. Leiva M. et al. arXiv:2307.02872 (2023).
[7] T. Thonhauser et al. Phys. Rev Lett. 95, 137205 (2005).
Keywords: Orbitronics; STO; Boltzmann transport