3 papers
physics.chem-ph2020
Tracing orbital images on ultrafast time scales
Robert Wallauer, Miriam Raths, Klaus Stallberg +10
Frontier orbitals, i.e., the highest occupied and lowest unoccupied orbitals of a molecule, generally determine molecular properties, such as chemical bonding and reactivities. Con…
cond-mat.mes-hall2020
Ultrafast dynamics of photocurrents in surface states of 3D topological insulators
Jens Güdde, Ulrich Höfer
This article reviews experimental work on the ultrafast electron dynamics in the topological surface state (TSS) of three-dimensional (3D) topological insulators (TIs) observed wit…
cond-mat.mes-hall2016
Spectroscopy and Dynamics of a Two-Dimensional Electron Gas on top of Ultrathin Helium Films on Cu(111)
Nico Armbrust, Jens Güdde, Ulrich Höfer +2
Electrons in image-potential states on the surface of bulk helium represent a unique model system of a two-dimensional electron gas. Here, we investigate their properties in the ex…