Topological valley currents via ballistic edge modes in graphene superlattices near the primary Dirac point

[摘要] By interfacing graphene with other materials it is possible to break the intrinsic inversion symmetry and observe interesting quantum transport phenomena. Here, the authors conduct transport measurements of encapsulated graphene at different alignment angles and find evidence of nonlocal resistance above and below 60 K suggesting the existence of a quantum valley Hall state.

[学科分类] 地球科学(综合)