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.
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Titolo: | O(N) model for charge density waves | |
Autori: | ||
Data di pubblicazione: | 1996 | |
Rivista: | ||
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. | |
Handle: | http://hdl.handle.net/11581/241968 | |
Appare nelle tipologie: | Articolo |