Stabilization of the surface CDW order parameter by long-range Coulomb interaction

P. P. Aseev, S. N. Artemenko

Research output: Contribution to journalArticle

Abstract

We study theoretically formation of two-dimensional (2D) charge density wave (CDW) in a system of conducting chains at the surface of an insulator due to interaction of quasi-1D surface electrons with phonons. We show that the unscreened long-range Coloumb interaction between the charges induced by fluctuations of the CDW phase stabilizes the finite order parameter value at finite temperatures, and thus the long-range order (LRO) exists. In the case of screened Coloumb interaction the phase fluctuations suppress the phase transition, but decay of the order parameter is rather slow, it obeys a power-law 〈 Δ(r)Δ(0)〉∝r- γ with small exponent γ.

Original languageEnglish
Pages (from-to)1835-1838
Number of pages4
JournalPhysica B: Condensed Matter
Volume407
Issue number11
DOIs
Publication statusPublished - 1 Jun 2012

Keywords

  • Coulomb interaction
  • Surface charge density wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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