Se p 19 96 A Frenkel - Kontorova Model with Two Spring Constants : New Phases and Phase Transitions
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چکیده
A discrete Frenkel-Kontorova model with two alternate spring constants k1 and k2 is studied. It is found that this model has many surprising behaviours. The continuum version of this model is different from the sine-Gordon equation, the continuum version of the standard FK model. More interestingly, it has an unpinned commensurate phase which is translationally invariant. A phase transition takes plae on a lattice point in the parameter space. We have also predicted another interesting phase transition in which an unlocked commensurate phase breaking translational invariance will take place as the strength of the substrate potential is increased. PACS numbers: 05.50.+q, 0.5.70 Fh, 05.70.Jk
منابع مشابه
J un 1 99 6 A Frenkel - Kontorova Model with Two Spring Constants : New Phase and Phase transition
A discrete Frenkel-Kontorova model with two alternate spring constants k1 and k2 is studied in detail. It is found that this model has a lots of surprising behaviors. The continuum version of this model is different from the sine-Gordon equation, which is the continuum version of the standard FK model. More interestingly, it has an unpinned commensurate phase which is translationally invariant ...
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تاریخ انتشار 1996