Band Engineering of Dirac Surface States in Topological-Insulator-Based van der Waals Heterostructures
Band Engineering of Dirac Surface States in Topological-Insulator-Based van der Waals Heterostructures
The existence of gapless Dirac surface band of a three dimensional (3D) topological insulator (TI) is guaranteed by the non-trivial topological character of the bulk band, yet the surface band dispersion is mainly determined by the environment near the surface. In this Letter, through in-situ angle-resolved photoemission spectroscopy (ARPES) and …