Ontology highlight
ABSTRACT:
SUBMITTER: Pan Y
PROVIDER: S-EPMC5648839 | biostudies-other | 2017 Oct
REPOSITORIES: biostudies-other
Nature communications 20171019 1
Circularly polarized photons are known to generate a directional helicity-dependent photocurrent in three-dimensional topological insulators at room temperature. Surprisingly, the phenomenon is readily observed at photon energies that excite electrons to states far above the spin-momentum locked Dirac cone and the underlying mechanism for the helicity-dependent photocurrent is still not understood. Here we show a comprehensive study of the helicity-dependent photocurrent in (Bi<sub>1-x</sub> Sb ...[more]