Quantum lattice fluctuations in nearly degenerate quasi one-dimensional polymers

C. Q. Wu, Y. Kawazoe

Research output: Contribution to journalArticlepeer-review

Abstract

It has been shown that the linear and nonlinear optical behaviors are quite different for degenerate and nondegenerate polymers. Quantum lattice fluctuations are believed to play an important role in the understanding of these optical properties. In this work, we study the quantum lattice fluctuations in a nondegenerate conjugated polymer by means of a modified Su-Schrieffer-Heeger-type model Hamiltonian. We first integrate out the electronic variables of the partition function and obtain an effective phonon action. Then an equation for the phonon order parameter is derived within a one-loop approximation. We find that the quantum lattice fluctuations is reduced by the nondegenerate ground state, especially in the weak electron-phonon coupling. This result is compatible with the optical properties of degenerate and nondegenerate polymers.

Original languageEnglish
Pages (from-to)1151-1152
Number of pages2
JournalSynthetic Metals
Volume85
Issue number1-3
DOIs
Publication statusPublished - 1997 Mar 15

Keywords

  • Electron-solid interactions
  • Polyacetylene and derivatives
  • Structural phase trasitions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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