A transition from a commensurate phase to an incommensurate phase in a continuous medium with dislocations
Bor T. , Pokrovskii V. L. , Talapov A. L.
A transition from a commensurate phase to an incommensurate phase is studied in an anisotropic system with a commensurability order ρ =2. A term which describes the formation of dislocations is added to the sine-Gordon theory. The phase transition acquires an Ising nature if the dislocations are taken into account.