Time-resolved terahertz dynamics in thin films of the topological insulator Bi${}_2$Se${}_3$

R. Valdés Aguilar, J. Qi, M. Brahlek +7

We use optical pump--THz probe spectroscopy at low temperatures to study the hot carrier response in thin Bi${}_2$Se${}_3$ films of several thicknesses, allowing us to separate the bul…