SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 53: Graphene

TT 53.7: Vortrag

Donnerstag, 30. März 2023, 16:45–17:00, HSZ 204

Quantum transport simulation for graphene on transition-metal dichalcogenides — •Wun-Hao Kang and Ming-Hao Liu — Department of Physics, National Cheng Kung University, Tainan, Taiwan

The strength of spin-orbit coupling (SOC) in pristine graphene was found from first-principles calculations to be in the order of µeV [1], which gives nearly no effects in transport experiments. Subsequent studies showed that the SOC can be significantly enhanced to the order of meV by putting graphene on transition-metal dichalcogenides (TMDC) [2]. Very recently, Tiwari P. et al. reported that the enhanced SOC can be experimentally observed in graphene/WSe2 systems [3]. Here we perform quantum transport simulations for graphene on TMDCs based on real-space tight-binding models [4], considering the Fabry-Pérot interferometer by using a gate-induced potential barrier as the cavity.
[1] M. Gmitra et al., Phys. Rev. B 80, 235431 (2009)
[2] M. Gmitra et al., Phys. Rev. B 93, 155104 (2016)
[3] P. Tiwari et al., npj 2D Mater Appl. 6, 68 (2022)
[4] M. Zubair et al., Phys. Rev. B 101, 165436 (2020)