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

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 $<Δ^*(r) Δ(0)> \propto r^{-γ}$ with small exponent $γ$
 Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Journal reference: Physica B 407 (2012), pp 1835-1838 DOI: 10.1016/j.physb.2012.01.043 Cite as: arXiv:1110.3608 [cond-mat.mes-hall] (or arXiv:1110.3608v1 [cond-mat.mes-hall] for this version)

## Submission history

From: Pavel Aseev [view email]
[v1] Mon, 17 Oct 2011 08:45:21 UTC (8 KB)
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