Quasi-particle scattering and protected nature of topological states in a parent topological insulator Bi${}_2$Se${}_3$

S. R. Park, W. S. Jung, Chul Kim +5

We report on angle resolved photoemission spectroscopic studies on a parent topological insulator (TI), Bi${}_2$Se${}_3$. The line width of the spectral function (inverse of the quasi-…