Tomonari Dotera, Masakiyo Kimoto and Junichi Matsuzawa
Interface Focus, 2, 575-581, 2012. DOI: 10.1098/rsfs.2011.0092
We find that 48/64 hard spheres per unit cell on the gyroid minimal surface are entropically self-organized. The striking evidence is obtained in terms of the acceptance ratio of Monte Carlo moves and order parameters. The regular tessellations of the spheres can be viewed as hyperbolic tilings on the Poincar'e disk with a negative Gaussian curvature, one of which is equivalently, the arrangement of angels and devils in Escher's Circle Limit IV.