Ontology highlight
ABSTRACT:
SUBMITTER: Sotome M
PROVIDER: S-EPMC6369763 | biostudies-literature | 2019 Feb
REPOSITORIES: biostudies-literature
Proceedings of the National Academy of Sciences of the United States of America 20190122 6
Photoexcitation in solids brings about transitions of electrons/holes between different electronic bands. If the solid lacks an inversion symmetry, these electronic transitions support spontaneous photocurrent due to the geometric phase of the constituting electronic bands: the Berry connection. This photocurrent, termed shift current, is expected to emerge on the timescale of primary photoexcitation process. We observe ultrafast evolution of the shift current in a prototypical ferroelectric sem ...[more]