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HL: Fachverband Halbleiterphysik

HL 24: Graphene and 2D Materials (joint session TT/HL)

HL 24.7: Vortrag

Mittwoch, 20. März 2024, 11:00–11:15, H 3007

Pseudomagnetotransport in strained and scaled graphene — Jia-Tong Shi, Aitor Garcia-Ruiz, and •Ming-Hao Liu — Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan

Graphene is highly susceptible to externally applied mechanical deformation due to its atomic thinness. As such, strained graphene has long been studied both theoretically and experimentally. Among all interesting predictions, the pseudo-magnetic field in graphene under properly designed strain fields, giving rise to effects equivalent to graphene under a strong external magnetic field on the order of 10 Tesla [1], is perhaps one of the most intensively discussed topics. Despite the experimentally observed pseudo-Landau levels due to strong pseudo-magnetic fields in graphene bubbles [2] and ripples [3], transport experiments showing strong pseudo-magnetic fields in strained graphene have so far been missing. To provide reliable guides to possible future pseudo-magnetotransport experiments on strained graphene, here we perform quantum transport simulations considering triaxially strained graphene using the scalable tight-binding model [4]. Numerical examples of transverse pseudo-magnetic focusing and pseudo-quantum Hall effect will be shown.

[1] F. Guinea, M. I. Katsnelson, A. K. Geim, Nat. Phys. 6 (2010) 30

[2] N. Levy et al., Science 329 (2010) 544

[3] S. Y. Li et al., Phys. Rev. Lett. 124 (2020) 106802

[4] M.-H. Liu, et al., Phys. Rev. Lett. 114 (2015) 036601

Keywords: quantum transport; strained graphene; pseudomagnetic field