Dynamical transitions in incommensurate systems

Details Dynamical transitions in incommensurate systems Dynamical transitions in incommensurate systems

2001-11-28

arxiv.org/abs/cond-mat/0111526v2

Physics

Condensed Matter

7 pages, 6 figures, file 'epl.cls' necessary for compilation provided; subm. to Europhysics Letters

Scientific paper

10.1209/epl/i2002-00270-x

In the dynamics of the undamped Frenkel-Kontorova model with kinetic terms, we find a transition between two regimes, a floating incommensurate and a pinned incommensurate phase. This behavior is compared to the static version of the model. A remarkable difference is that, while in the static case the two regimes are separated by a single transition (the Aubry transition), in the dynamical case the transition is characterized by a critical region, in which different phenomena take place at different times. In this paper, the generalized angular momentum we have previously introduced, and the dynamical modulation function are used to begin a characterization of this critical region. We further elucidate the relation between these two quantities, and present preliminary results about the order of the dynamical transition.

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