Fig. 1: Exciton hybridization in TMD moiré structures.
From: Förster valley-orbit coupling and topological lattice of hybrid moiré excitons
a Schematics of hybrid excitons in TMD homobilayers (upper) and heterobilayers (lower). Black (white) dots denote the electron (hole). T denotes interlayer hopping. b Spatially varying interlayer hopping in R-stacking bilayers. Hopping vanishes at the high symmetry points B (MX) and C (XM), and has a p-wave form in their vicinity. The insets below show their local stacking. The phase of T is color-coded to show the counterclockwise and clockwise winding patterns around the B and C points, respectively. In the vicinity of A point of MM stacking, the hopping has an s-wave form. c Schematics of the center-of-mass envelope functions of the hybrid exciton at high symmetry points. The minor intralayer component exhibits an s-wave and a p-wave envelope at A point and B/C points, respectively, whereas the major interlayer component always has an s-wave envelope for the lowest energy state in the confinement. Black (white) dots represent the electron (hole), indicating their intralayer/interlayer components.
