Photoinduced Structural Phase Transitions in Polyacene
Abstract
There exist two types of structural instability in polyacene: double bonds in a cis pattern and those in a trans pattern. They are isoenergetic but spectroscopically distinct. We demonstrate optical characterization and manipulation of Peierls-distorted polyacene employing both correlated and uncorrelated Hamiltonians. We clarify the phase boundaries of the cis- and trans-distorted isomers, elucidate their optical-conductivity spectra, and then explore their photoresponses. There occurs a photoinduced transformation in the polyacene structure, but it is one-way switching: The trans configuration is well convertible into the cis one, whereas the reverse conversion is much less feasible. Even the weakest light irradiation can cause a transition of uncorrelated electrons, while correlated electrons have a transition threshold against light irradiation.
Cite
@article{arxiv.1106.4158,
title = {Photoinduced Structural Phase Transitions in Polyacene},
author = {Shoji Yamamoto},
journal= {arXiv preprint arXiv:1106.4158},
year = {2015}
}
Comments
14 pages with 15 figures embedded