Pauschenwein Gernot J, Kahl Gerhard
Center for Computational Materials Science and Institut für Theoretische Physik, Technische Universität Wien, Wiedner Hauptstraße 8-10, A-1040 Wien, Austria.
Soft Matter. 2008 Jun 20;4(7):1396-1399. doi: 10.1039/b806147e.
We give evidence that particles interacting via the simple, radially symmetric square-shoulder potential can self-organise in highly complex, low-symmetry lattices, thereby forming clusters, columns, or lamellae; only at high pressure are compact, high-symmetry structures observed. Our search for these ordered equilibrium structures is based on ideas of genetic algorithms, a strategy that is characterised by a high success rate. A simple mean-field type consideration complements these findings and locates in a semi-quantitative way the cross-over between the competing structures.
我们提供的证据表明，通过简单的径向对称方肩势相互作用的粒子可以在高度复杂、低对称性的晶格中自组织，从而形成团簇、柱状或层状结构；只有在高压下才会观察到紧凑的高对称性结构。我们对这些有序平衡结构的搜索基于遗传算法的思想，这是一种成功率很高的策略。一个简单的平均场类型的考虑补充了这些发现，并以半定量的方式确定了竞争结构之间的转变点。
