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 language | English |
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Pages (from-to) | 1835-1838 |
Number of pages | 4 |
Journal | Physica B: Condensed Matter |
Volume | 407 |
Issue number | 11 |
DOIs | |
Publication status | Published - 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