Ontology highlight
ABSTRACT:
SUBMITTER: Luo L
PROVIDER: S-EPMC6363774 | biostudies-literature | 2019 Feb
REPOSITORIES: biostudies-literature
Nature communications 20190205 1
Topology-protected surface transport of ultimate thinness in three-dimensional topological insulators (TIs) is breaking new ground in quantum science and technology. Yet a challenge remains on how to disentangle and selectively control surface helical spin transport from the bulk contribution. Here we use the mid-infrared and terahertz (THz) photoexcitation of exclusive intraband transitions to enable ultrafast manipulation of surface THz conductivity in Bi<sub>2</sub>Se<sub>3</sub>. The unique, ...[more]