Landau level spectroscopy of surface states in the topological insulator Bi${}_{0.91}$Sb${}_{0.09}$ via magneto-optics

A. A. Schafgans, A. A. Taskin, Yoichi Ando +4

We have performed broad-band zero-field and magneto-infrared spectroscopy of the three dimensional topological insulator Bi${}_{0.91}$Sb${}_{0.09}$. The zero-field results allow us to…