Stacking-Dependent Optical Conductivity of Bilayer Graphene
Stacking-Dependent Optical Conductivity of Bilayer Graphene
The optical conductivities of graphene layers are strongly dependent on their stacking orders. Our first-principle calculations show that, while the optical conductivities of single-layer graphene (SLG) and bilayer graphene (BLG) with Bernal stacking are almost frequency-independent in the visible region, the optical conductivity of twisted bilayer graphene (TBG) is frequency-dependent, …