Ontology highlight
ABSTRACT:
SUBMITTER: Braun L
PROVIDER: S-EPMC5095513 | biostudies-other | 2016 Oct
REPOSITORIES: biostudies-other
Nature communications 20161031
Three-dimensional topological insulators are fascinating materials with insulating bulk yet metallic surfaces that host highly mobile charge carriers with locked spin and momentum. Remarkably, surface currents with tunable direction and magnitude can be launched with tailored light beams. To better understand the underlying mechanisms, the current dynamics need to be resolved on the timescale of elementary scattering events (∼10 fs). Here, we excite and measure photocurrents in the model topolog ...[more]