Corrugate graphene systems for Rashba-like valley-orbital coupling

Local deformation in graphene are gathering great interest because it introduces huge pseudo-magnetic field to modify the electronic states nearby to host novel transport properties [1]. The graphene nanobubble, for instance, is predicted to strongly polarize the valley of an injecting current [2]. In this respect, the nontrivial valley-dependent band structure can be introduced when a local deformation turns into periodic. In this talk, we will show that the Rashba-like valley bands form in corrugated graphene systems. Moreover, the low-energy bands refer to magnetic snake states moving along the corrugations and thus can provide one-dimensional-like ballistic valley transport.

[1] R. Carrillo-Bastos,et al., Phys. Rev. B 94, 125422 (2016).
[2] Mikkel Settnes, et al., Phys. Rev. Lett. 117, 276801 (2016).