O(N) model for charge density waves

Federico Corberi and Umberto Marini Bettolo Marconi

Physica A: Statistical Mechanics and its Applications, 1996, vol. 225, issue 3, 281-293

Abstract: We generalize the Fukuyama, Lee, Rice model for pinned charge density waves to the case of an O(N) vector order parameter and exactly solve the large-N limit. A second order field induced phase transition is observed, from a pinned to a conducting phase, analogously to the scalar case. The pinned region displays an infinite number of metastable equilibrium states while, above threshold, the system has a periodic solution. The model subject to a time dependent external field shows interesting analogies with some features observed in real materials such as the field cooled and the pulse sign memory effects.

Date: 1996
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:225:y:1996:i:3:p:281-293

DOI: 10.1016/0378-4371(95)00331-2

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