| Autor: |
Aseev, P., Artemenko, S. N. |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Physica B 407 (2012), pp 1835-1838 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.physb.2012.01.043 |
| Popis: |
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 $<\Delta^*(r) \Delta(0)> \propto r^{-\gamma}$ with small exponent $\gamma$ |
| Databáze: |
arXiv |
| Externí odkaz: |
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