Anisotropic effect of warping on the lifetime broadening of topological surface states in angle-resolved photoemission from Bi${}_2$Te${}_3$

J. Sánchez-Barriga, M. R. Scholz, E. Golias +5

We analyze the strong hexagonal warping of the Dirac cone of Bi${}_2$Te${}_3$ by angle-resolved photoemission. Along $\overline{\Gamma }$$\overline{\mathrm{M}}$, the dispersion deviates from a line…