Stable crystalline lattices in two-dimensional binary mixtures of dipolar particles

Abstract

The phase diagram of binary mixtures of particles interacting via a pair potential of parallel dipoles is computed at zero temperature as a function of composition and the ratio of their magnetic susceptibilities. Using lattice sums, a rich variety of different stable crystalline structures is identified including $A_m{B}_n$ structures. [$A$ $(B)$ particles correspond to large (small) dipolar moments.] Their elementary cells consist of triangular, square, rectangular or rhombic lattices of the $A$ particles with a basis comprising various structures of $A$ and $B$ particles. For small (dipolar) asymmetry there are intermediate $A{B}_2$ and $A_{2}B$ crystals besides the pure $A$ and $B$ triangular crystals. These structures are detectable in experiments on granular and colloidal matter.

6 pages - 2 figs - phase diagram updated

References in corpus (3)

• Partial Clustering in Binary Two-Dimensional Colloidal Suspensions
• Lane reduction in driven 2d-colloidal systems through microchannels
• Reentrant transitions in colloidal or dusty plasma bilayers

Cited by in corpus (1)

• Binary crystals in two-dimensional two-component Yukawa mixtures