Regensburg 2025 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 53: 2D Semiconductors and van der Waals Heterostructures V
HL 53.3: Talk
Thursday, March 20, 2025, 15:30–15:45, H15
Unraveling Rashba spin-orbit coupling in TMDs — •Miguel Morales Cocera1,2, Marta Prada1, and Gabriel Bester1 — 1University of Hamburg, Institute of Physical Chemistry, 22761 Hamburg, Germany — 2Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
Transition metal dichalcogenides (TMDs) possess unique optical and electronic properties, making them ideal candidates for exploring new physical phenomena. Their significant spin-orbit coupling enables a rich landscape of spin-valley physics within the realm of excitonic effects or topologically non-trivial materials, to name a few. However, there are still unanswered questions concerning the mechanisms that rule Rashba spin-orbit coupling (RSOC), such as the role of the atomic and orbital composition, number of layers, or band character. In this work, we employ ab-initio calculations together with perturbative approaches to unravel the intricacies of bilayer TMDs with an intrinsic dipole, which is far from trivial. We deliver with high numerical precision the Rashba parameters in Rmx (Bernal stacking) bilayers (M= Mo, W. X=S, Se, Te).
Keywords: Rashba; Spin-Orbit Coupling; Transition Metal Dichalcogenides