Unconventional charge density wave arising from electron-phonon interaction

András Ványolos, B. Dóra, A. Virosztek

Research output: Contribution to journalArticle

Abstract

We report of a theoretical study on quasi-one dimensional unconventional charge density wave (UCDW) driven by electron-phonon interaction. Within mean field theory, we find that the wavevector dependence of the coupling leads to a momentum dependent single particle gap on the Fermi surface. The presence of small energy single particle excitations around the gap nodes significantly changes the optical conductivity compared to the conventional CDW result. In addition to that, the collective phase excitation arising from fluctuation of the order parameter leads to further qualitative changes of the conductivity and results in an effective mass that is nonmonotonic in temperature.

Original languageEnglish
Pages (from-to)643-645
Number of pages3
JournalJournal of Superconductivity and Novel Magnetism
Volume20
Issue number7-8
DOIs
Publication statusPublished - Nov 2007

Fingerprint

Optical conductivity
Charge density waves
Electron-phonon interactions
Mean field theory
Fermi surface
electron phonon interactions
Momentum
conductivity
excitation
Fermi surfaces
momentum
Temperature
temperature
energy

Keywords

  • Charge density wave
  • Collective mode
  • Optical conductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Unconventional charge density wave arising from electron-phonon interaction. / Ványolos, András; Dóra, B.; Virosztek, A.

In: Journal of Superconductivity and Novel Magnetism, Vol. 20, No. 7-8, 11.2007, p. 643-645.

Research output: Contribution to journalArticle

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