摘要:
In this talk, I will show that Hall-like effects can be created in graphene systems by using geometry instead of applying an external magnetic field. We theoretically establish that non-trivial band structure with valley-orbital splitting can be designed in a bilayer graphene (BLG) by corrugating it. This band structure with topology finally generates the Hall resistivity in both linear response and nonlinear response regimes. Our theoretical calculations well address the experimental observations qualitatively and quantitatively. This new approach based on tailoring 2D-material geometry opens a new platform to design the band structure to host new transport properties.