Many exciting phenomena in physics, chemistry and biology are caused by the ultrafast motion of electrons and nuclei on atomic scales. We study ultrafast phenomena by computational means, our main focus is on exploring the motion of electronic excitations in condensed matter. For our studies, we employ and develop custom-tailored electronic structure methods.
Current research topics include:
|Ultrafast electron dynamics||Electronic structure method development|
For high-harmonic generation, an intense laser pulse is targeted on a substrate producing high-frequency radiation. We derive a transparent analytical formula that describes the relation between laser pulse parameters and peak positions in the high-harmonic spectrum.
Article: Phys. Rev. B 107, 054306 (2023) (selected as Editor's Suggestion)
We are very happy to receive funding within the Emmy Noether Programme of the DFG. In the project, we will analyze ultrafast exciton dynamics using first-principles simulations.
Researchers in Prof. Venkataraman's group (Columbia University, New York) have built organic topological-insulator wires. Longer wires show an unusual increase in conductance. Our theoretical models support an interpretation of this finding based on topology.
Article: Nat. Chem. 14, 1061 (2022)
Press release available at phys.org.
Together with the groups of Prof. Huber, Prof. Richter (both UR) and Prof. Höfer (UR and Uni Marburg), we describe a novel generation mechanism of high harmonics in the surface state of a topological insulator.
Article: Nature 593, 385 (2021)