Abstract
Using Monte Carlo simulations, we investigate the thermodynamical behavior of two different interfaces: the first one corresponds to an antiphase boundary in the ordered L12 phase on a fcc lattice and the second one corresponds to an antiphase boundary in the ordered DO 3 phase on a bcc lattice. We show that in both cases the interface undergoes a roughening transition at a temperature T R below the bulk order-disorder transition. The temperature dependence of the interface profile near T R is in good agreement with the Kosterlitz-Thouless theory. However, the two interfaces behave differently in the neighborhood of the bulk transitions. When the bulk transition is of the first order, the rough antiphase is wetted by the disordered phase and splits into two rough order-disorder interfaces. When the bulk transition is of the second order, the bulk correlation length becomes the only relevant length scale: the antiphase thickness diverges as ξ b .
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
