title: Nonadiabatic dynamics within time-dependent density functional tight binding method.
abstract: A nonadiabatic molecular dynamics is implemented in the framework of the time-dependent density functional tight binding method (TDDFTB) combined with Tully's stochastic surface hopping algorithm. The applicability of our method to complex molecular systems is illustrated on the example of the ultrafast excited state dynamics of microsolvated adenine. Our results demonstrate that in the presence of water, upon initial excitation to the S(3) (pi-pi*) state at 260 nm, an ultrafast relaxation to the S(1) state with a time constant of 16 fs is induced, followed by the radiationless decay to the ground state with a time constant of 200 fs.
authors.affiliation: Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany. mitric@zedat.fu-berlin.de
authors.forename: Roland
authors.initials: R
authors.lastname: Mitrić
authors.forename: Ute
authors.initials: U
authors.lastname: Werner
authors.forename: Matthias
authors.initials: M
authors.lastname: Wohlgemuth
authors.forename: Gotthard
authors.initials: G
authors.lastname: Seifert
authors.forename: Vlasta
authors.initials: V
authors.lastname: Bonacić-Koutecký