Quantum phonons and the peierls transition temperature

H. Zheng, S. Y. Zhu, Wei-Yeu Chen

Research output: Contribution to journalJournal articlepeer-review

2 Citations (Scopus)

Abstract

The effect of quantum phonons on the Peierls transition temperature in a one-dimensional commensurate system is studied. The nonadiabatic effect due to finite phonon frequency ωp>0 are treated through an energy-dependent electron-phonon scattering function δ(k′, k). By using the Green's-function perturbation theory we have shown that our theory gives a good description of the effect of quantum phonons: (i) There exists a critical electron-phonon coupling gc2. The Peierls transition temperature Tp=0 when the coupling g2<gc2 and Tp increases with increasing g2>gc2. (ii) The ratio 2Δ/Tp could be much larger than the BCS value 3.527.

Original languageEnglish
Article number014304
Pages (from-to)143041-143048
Number of pages8
JournalPhysical Review B
Volume65
Issue number1
DOIs
Publication statusPublished - 1 Jan 2002

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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