THz response and colossal Kerr rotation from the surface states of the topological insulator Bi${}_2$Se${}_3$

R. Valdés Aguilar, A. V. Stier, W. Liu +8

Ordered states of matter are typically categorized by their broken symmetries. With the ordering of spins in a ferromagnet or the freezing of a liquid into a solid, the loss of sym…