Title: Translationally invariant polarons in conjugated conducting polymers
Authors: Meng, HF
Lai, CM
Department of Electrophysics
Institute of Physics
Issue Date: 15-May-1997
Abstract: A simple effective Hamiltonian for the electron-phonon coupling in the conjugated polymers is derived from the Su-Schrieffer-Heeger model with quantized lattice motions. Phonons correspond to lattice quantum fluctuations around the dimerized positions. Both acoustic and optical modes are considered. The energy-momentum relation for the polaron is calculated variationally, with the aid of Lee-Low-Pines transformation. The discrete translational invariance of an ideal conjugated polymer is. explicitly enforced. Analytical expression for the polaron effective mass m* is obtained. m* turns out to be, in general, much larger than the conduction-band effective mass.
URI: http://hdl.handle.net/11536/536
ISSN: 0163-1829
Volume: 55
Issue: 20
Begin Page: 13611
End Page: 13617
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