Electron-electron interactions and broken symmetry in one dimension

Sumitendra Mazumdar, S. N. Dixit

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A novel real-space approach to dimerization in a half-filled band is developed to investigate effects of electron-electron interactions on the Peierls instability. Dimerization is shown to be a result of imperfect resonance between pairs of electron configurations related to each other by a mirror plane symmetry passing through the longest diagonal of the infinite polygon. Coulomb interactions enhance the barrier to perfect resonance, so that dimerization itself is enhanced for moderate values of the correlation parameter. Recent experimental findings and the present theoretical work then suggest that explicit inclusion of Coulomb interactions between electrons may be necessary for an accurate description of ground and excited states in polyacetylene.

Original languageEnglish (US)
Pages (from-to)275-281
Number of pages7
JournalSynthetic Metals
Volume9
Issue number2
DOIs
Publication statusPublished - 1984
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

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