Crystallization of binary mixtures of similar dipole moments in two dimensions: A Monte Carlo study
Equipe BioPhysStat, Université de Lorraine, IJB FR CNRS 2843 - 1 Boulevard Arago, 57070 Metz, France
Received: 31 May 2016
Accepted: 1 August 2016
Two-dimensional binary mixtures made up of particles carrying similar parallel dipole moments are investigated. Using Monte Carlo simulations a detailed structural analysis based on partial pair distribution functions and microstructure snapshots is presented for high dipolar coupling. At equimolar composition, the relevance of the coexistence of triangular superlattices with stoichiometry AB2 and A2B is revealed, with A(B) standing for the large(small) dipole moments. This key finding is in excellent qualitative agreement with the zero-temperature theoretical prediction of Assoud L. et al., EPL, 80 (2007) 48001. These structures are detectable in experiments on colloidal and granular matter.
PACS: 82.70.Dd – Colloids / 61.50.Ah – Theory of crystal structure, crystal symmetry; calculations and modeling / 61.66.Dk – Alloys
© EPLA, 2016