No abstract

No abstract

The commensurate-incommensurate phase transition in the classical one dimensional double sine· Gordon (Ds-G) system is studied analitically. The energy density of kink lattice and the ratio of the mean misfit parameter (q) to the original one (qo) are calculated in order to discuss the phase transition. It is shown that the phase transition occurs in qualitatively the same manner as sine-Gordon (s-G) system with the change of two competing interactions. qf Qo shows, on the whole, crossover behavior from one s-G behavior to another s-G one as the relative magnitude of two commensurability potentials is changed.Comparison between qf Qo's in s-G and Ds-G cases indicates that the presence of the extra comme[\surability potential makes the system more incommensurate.

No abstract

No abstract