Semiclassical formalism of optical absorption and breathers in polyacetylene

Journal Article · Mon May 23 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.60.2210· OSTI ID:5219753

Horovitz, B; Bishop, A R; Phillpot, S R

A formalism for the optical absorption in a coupled electron-ion system is developed. The formalism assumes an initial trajectory with frequency much lower than electronic energy scales, and a short memory condition, i.e., the excited-state trajectories diverge away from the initial trajectory within one period. The result shows nonadiabatic features such as level broadening, sidebands, and tails in nonclassical regimes. We apply the formalism to breather modes in polyacetylene and show that they can account for the intragap absorption tail and for the observed photoinduced absorption at 1.35 eV.

• Research Organization: Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5219753
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 60:21; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ABSORPTION SPECTRA
CHARGED PARTICLES
COUPLING
ELECTRONS
ELEMENTARY PARTICLES
ENERGY GAP
ENERGY RANGE
EV RANGE
EV RANGE 01-10
FERMIONS
HYDROCARBONS
IONS
LEPTONS
LINE BROADENING
MANY-BODY PROBLEM
MEMORY DEVICES
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POLYACETYLENES
POLYENES
SEMICLASSICAL APPROXIMATION
SPECTRA
TRAJECTORIES