Abstract:
The conventional Landau – Ginzburg theory of interphase boundaries is generalized to the case of not small values of order parameters, with application to polytwinned structures characteristic of cubic-tetragonal-type phase transitions. Explicit expressions for the structure and energy of antiphase boundaries via the functions entering the free energy functional are given. A peculiar dependence of equilibrium orientations of antiphase boundaries on the interaction type is predicted, and it qualitatively agrees with available experimental data.
Citation:
V. G. Vaks, “Ginzburg – Landau-type theory of antiphase boundaries in polytwinned structures”, Pis'ma v Zh. Èksper. Teoret. Fiz., 73:5 (2001), 274–278; JETP Letters, 73:5 (2001), 237–241