SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 4: Spin Transport and Orbitronics, Spin-Hall Effects (joint session MA/TT)
MA 4.9: Vortrag
Montag, 27. März 2023, 11:30–11:45, HSZ 403
Spin and orbital Edelstein effect in a bi- and trilayer system with Rashba interaction — •Sergio Leiva1, Jürgen Henk1, Ingrid Mertig1, and Annika Johansson2 — 1Martin Luther University Halle-Wittenberg, Halle, Germany — 2Max Planck Institute of Microstructure Physics, Halle, Germany
The spin Edelstein effect has proved to be a promising phenomenon to generate spin polarization from a charge current in systems without inversion symmetry. In recent years, current-induced orbital magnetization, also called the orbital Edelstein effect, has also been predicted for several systems with broken inversion symmetry [1-6].
In the present work, we calculate the current-induced spin and orbital magnetization for a bilayer and a trilayer system with Rashba interaction for the interface and the free-standing slab configurations. We use the modern theory of orbital magnetization [7] and the Boltzmann transport theory. We found a significantly larger orbital than spin effect, with a strong dependence on the model parameters, such as effective mass and spin-orbit coupling per layer. This dependence allows us to enhance and even revert the sign of the orbital effect.
[1] T. Yoda et al., Sci. Rep., 5, 12024 (2015).
[2] D. Go et al., Sci. Rep. 7, 46742 (2017)
[3] T. Yoda et al., Nano Lett., 18, 916 (2018).
[4] L. Salemi et al., Nat. Commun. 10, 5381 (2019)
[5] D. Hara et al., Phys. Rev. B, 102, 184404 (2020).
[6] A. Johansson et al., Phys. Rev. Research, 3, 013275 (2021).
[7] T. Thonhauser et al. Phys. Rev Lett. 95, 137205 (2005).