arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1303.6786cond-mat.softcond-mat.mtrl-sciphysics.chem-ph
收藏

常平均曲率曲面的缺陷模

Defect Motifs for Constant Mean Curvature Surfaces

Halim Kusumaatmaja, David J. Wales

摘要:

嵌入在恒定平均曲率表面上的静电带电粒子的能量景观进行了分析,系统的大小,曲率和相互作用的潜力范围很广。表面被认为是刚性的,盆跳跃方法被用来定位假定的全球最小结构。有利于势能的缺陷图案同意胶体系统的实验观察:扩展缺陷(疤痕和褶皱)弱正和负高斯曲率,和孤立的缺陷强负高斯曲率。在这些制度之间的相边界附近的两个图案是在激烈的竞争,证明了在势能景观的外观不同的漏斗。我们还报告了一个新的缺陷图案组成的五边形对。

英文摘要:

The energy landscapes of electrostatically charged particles embedded on constant mean curvature surfaces are analysed for a wide range of system size, curvature, and interaction potentials. The surfaces are taken to be rigid, and the basin-hopping method is used to locate the putative global minimum structures. The defect motifs favoured by potential energy agree with experimental observations for colloidal systems: extended defects (scars and pleats) for weakly positive and negative Gaussian curvatures, and isolated defects for strongly negative Gaussian curvatures. Near the phase boundary between these regimes the two motifs are in strong competition, as evidenced from the appearance of distinct funnels in the potential energy landscape. We also report a novel defect motif consisting of pentagon pairs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑