TY  - JOUR
A1  - Duan, Hong-Guang
A1  - Nalbach, Peter
A1  - Miller, R. J. Dwayne
A1  - Thorwart, Michael
T1  - Ultrafast Energy Transfer in Excitonically Coupled Molecules Induced by a Nonlocal Peierls Phonon
T2  - The Journal of Physical Chemistry (JPC)
N2  - Molecular vibration can influence exciton transfer via either a local (intramolecular) Holstein or a nonlocal (intermolecular) Peierls mode. We show that a strong vibronic coupling to a nonlocal mode dramatically speeds up the transfer by opening an additional transfer channel. This Peierls channel is rooted in the formation of a conical intersection of the excitonic potential energy surfaces. For increasing Peierls coupling, the electronically coherent transfer for weak coupling turns into an incoherent transfer of a localized exciton through the intersection for strong coupling. The interpretation in terms of a conical intersection intuitively explains recent experiments of ultrafast energy transfer in photosynthetic and photovoltaic molecular systems.
Y1  - 2019
UR  - https://whge.opus.hbz-nrw.de/frontdoor/index/index/docId/3665
SN  - 1948-7185
VL  - 10
IS  - 6
SP  - 1206
EP  - 1211
ER  -