Terahertz magneto-photocurrents in the topological insulator Bi${}_2$Se${}_3$ probe its topological surface states

Chihun In, Genaro Bierhance, Deepti Jain +5

We study ultrafast magneto-photocurrents in a three-dimensional topological insulator. For this purpose, we excite (In${}_r$Bi${}_{1-r}$)${}_2$Se${}_3$ thin films with a femtosecond laser…