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.

14 pages with 15 figures embedded

References in corpus (13)

• The radical character of the acenes: A density matrix renormalization group study
• A large-scale correlated study of linear optical absorption and low-lying excited states of polyacenes: Pariser-Parr-Pople Hamiltonian
• Structural and Electronic Instabilities in Polyacenes: Density Matrix Renormalization Group Study of a Long--Range Interacting Model
• Correlated theory of triplet photoinduced absorption in phenylene-vinylene chains
• Theory of excited state absorptions in phenylene-based $\pi$-conjugated polymers
• Electronic and Lattice Dynamics in The Photoinduced Ionic-to-Neutral Phase Transition in a One-Dimensional Extended Peierls-Hubbard Model
• Pressure-induced phase transitions of halogen-bridged binuclear metal complexes R_4[Pt_2(P_2O_5H_2)_4X]nH_2O
• Optical characterization of platinum-halide ladder compounds
• Nonlinear lattice relaxation of photoexcited diplatinum-halide chain compounds
• Competing ground states of metal-halide ladders
• Optical characterization of ground states of polyacene
• Charge ordering in quarter-filled ladder systems coupled to the lattice
• Photoproduction of spin and charge carriers in halogen-bridged binuclear platinum chain complexes