A small U approach to the 4kF reflections in organic linear chain compounds

M. Weger*, H. Gutfreund

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

It is shown that a lattice distortion of wavevector 4kF with an essentially one-dimensional correlation occurs in a one-dimensional metal when the intramolecular Coulomb interaction U is small compared with the band-width 4t; ( U 4t {reversed tilde equals} 1 4). This one-dimensional property suppresses the real phase-transition temperature well below the mean-field transition, where fluctuative 4kF distortions build up. This accounts for the 4kF reflections observed in TTF-TCNQ and several other charge transfer compounds. The strong locking of the electrons to the lattice when the band is 1 4 (or 1 2) full, and weak locking when the band is 1 3 (or 2 3) full, are also accounted for.

Original languageEnglish
Pages (from-to)1259-1264
Number of pages6
JournalSolid State Communications
Volume32
Issue number12
DOIs
StatePublished - Dec 1979

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