High-Resolution Faraday Rotation and Electron-Phonon Coupling in Surface States of the Bulk-Insulating Topological Insulator Cu${}_{0.02}$Bi${}_2$Se${}_3$

Liang Wu, Wang-Kong Tse, M. Brahlek +5

We have utilized time-domain magneto-terahertz spectroscopy to investigate the low frequency optical response of topological insulator Cu${}_{0.02}$Bi${}_2$Se${}_3$ and Bi${}_2$Se${}_3$ film…