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 |
|---|---|
| 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 |
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Keywords
- Coulomb interaction
- Surface charge density wave
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Stabilization of the surface CDW order parameter by long-range Coulomb interaction. / Aseev, P. P.; Artemenko, S. N.
In: Physica B: Condensed Matter, Vol. 407, No. 11, 01.06.2012, p. 1835-1838.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Stabilization of the surface CDW order parameter by long-range Coulomb interaction
AU - Aseev, P. P.
AU - Artemenko, S. N.
PY - 2012/6/1
Y1 - 2012/6/1
N2 - 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.
AB - 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.
KW - Coulomb interaction
KW - Surface charge density wave
UR - http://www.scopus.com/inward/record.url?scp=84859529852&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859529852&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2012.01.043
DO - 10.1016/j.physb.2012.01.043
M3 - Article
VL - 407
SP - 1835
EP - 1838
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 11
ER -