Transverse Magnetic Focusing in Proximitized Graphene

Wun-Hao Kang^1,2*, Qing Rao³, Dong-Keun Ki³, Denis Kochan^4,2, Ming-Hao Liu^1,2

¹Department of Physics, National Cheng Kung University, Tainan, Taiwan
²Center for Quantum Frontiers of Research and Technology (QFort), National Cheng Kung University, Tainan, Taiwan
³Department of Physics and HK Institute of Quantum Science & Technology, The University of Hong Kong, Hong Kong, China
⁴Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovak Republic

* Presenter:Wun-Hao Kang, email:ranidae12@gmail.com

Graphene-based van der Waals heterostructures take advantage of tailoring spin-orbit coupling (SOC) in the graphene layer by proximity effect. Significantly, the band structures of graphene/transition-metal dichalcogenides (TMDC) show the broken spin degeneracy of the Dirac cone in the direct gap of TMDC by the ab initio calculations. This work utilizes the tight-binding Hamiltonian of proximitized graphene to simulate the transverse magnetic focusing measurement with a large-scale device. To support the experiment data, which implies the strength of the SOC is up to 13 meV compared with the 100 μeV of pristine graphene. In addition, we propose a scheme for a direct estimation of the angle of rotated in-plane spin direction due to twisting between two layers.

Keywords: Quantum transport simulation, Proximitized graphene, Spin-orbit coupling, Transverse magnetic focusing