Development of ab initio time-dependent GW+BSE method based on surface hopping scheme in nonadiabatic molecular dynamics
EMSL Project ID
50834
Abstract
An exciton is a quasiparticle formed by an electron and a hole, which interact through the Coulomb interaction. It generally describes optically excited states in insulators, semiconductors, and liquids. The dynamics of excitons, including the hot exciton relaxation and electron-hole recombination, play crucial roles in the energy transfer processes for sustainable energy generation. Calculating the electronic structure of excited states in solids requires many-body perturbation theory approaches such as green's function based many-body perturbation and Bethe-Salpeter equation (GW+BSE). In this project, we plan to develop the ab initio time-dependent GW+BSE (TDGW+BSE) method based on the classical path approximation (CPA) and surface hopping scheme in nonadiabatic molecular dynamics (NAMD). The spin-orbit coupling (SOC) will be included in order to investigate spin dynamics of the electron/hole in the exciton. We expect the proposed TDGW+BSE method will become an important tool to investigate the ultrafast exciton dynamics in condensed matter systems. With the collaboration with the time-resolved multi-photon photoemission (TR-mPP) spectroscopy experiments at the University of Pittsburgh, we will try to reach the benchmarks of the newly developed TDGW+BSE method.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2019-10-01
End Date
2021-12-31
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
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