Reflectivity of a one-dimensional electron-phonon system

H. Gutfreund, B. Horovitz, M. Weger

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The effect of the giant Kohn anomaly in a one dimensional system on the optical reflectivity is calculated, for parameters believed to be characteristic for TTFTCNQ. It is found that the Kohn anomaly in the optical phonon branch due to stretching vibrations of the CN groups, whose unperturbed frequency is 2100-2200 cm-1, produces a minimum in the reflectivity at 1600 cm-, approximately. This minimum coincides with the minimum w found experimentally by Bright, Garito and Heeger. By this mechanism, phonons with a wavevector of order 2kF affect the reflectivity of photons with q ≈ 0.

Original languageEnglish
Pages (from-to)849-853
Number of pages5
JournalSolid State Communications
Issue number5
StatePublished - 1 Sep 1974
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics
  • Materials Chemistry


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