Regensburg 2025 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 55: Graphene and 2D Materials (joint session TT/HL)
HL 55.1: Talk
Thursday, March 20, 2025, 15:00–15:15, H33
Magnetotransport of the Radial Rashba Spin-Orbit Coupling in Proximitized Graphene — •Wun-Hao Kang1,2, Ming-Hao Liu1,2, and Denis Kochan2,3 — 1Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan — 2Center for Quantum Frontiers of Research and Technology (QFort), National Cheng Kung University, Tainan 70101, Taiwan — 3Institute of Physics, Slovak Academy of Sciences, 84511 Bratislava, Slovakia
Graphene-based van der Waals heterostructures take advantage of tailoring spin-orbit coupling (SOC) in the graphene layer by the proximity effect. The proximity effect can be effectively modeled by the tight-binding Hamiltonian involving novel SOC terms[1] and allows for an admixture of the tangential and radial spin-textures[2]. Taking such effective models we perform realistic large-scale magnetotransport calculations–transverse magnetic focusing–and show that there are unique qualitative and quantitative features allowing for an unbiased experimental disentanglement of the conventional Rashba SOC from its novel radial counterpart, called here the radial Rashba SOC. Along with that, we propose a scheme for a direct estimation of the Rashba angle by exploring the magneto response symmetries when swapping an in-plane magnetic field[3].
[1] M. Gmitra et al., Phys. Rev. B 93, 155104 (2016).
[2] K. Zollner et al., Phys. Rev. B 108, 235166 (2023).
[3] W.-H. Kang et al., Phys. Rev. Lett. 133, 216201 (2024).
Keywords: Graphene; Spintronics; Spin-orbit coupling; Rashba coupling