标题： 在微结构沟槽晶格上实现的胶体人工冰的挫败工程 显示英文标题

标题： Engineering of frustration in colloidal artificial ices realized on microfeatured grooved lattices

摘要： 人工自旋冰系统，即相互作用的单域铁磁岛晶格，迄今为止已被用作由晶格拓扑引起的挫折的微观模型，允许直接可视化自旋排列和纹理。 然而，工程化可以原位操控的挫折冰态，并实时观察其集体动力学仍然是具有挑战性的任务。 受近期理论进展的启发，我们在这里利用被限制在双稳重力陷阱晶格中的可极化粒子，实现了一个胶体版本的人工自旋冰系统。 我们定量地展示了，在这种挫折性软物质系统中，通过调节微观单元之间的对相互作用强度，会出现冰选择规则。 通过独立控制粒子定位和偶极耦合，我们引入了类似单极子的缺陷和字符串，并使用具有特定手性的环作为存储二进制信息的基本单元。 显示英文摘要

摘要： Artificial spin ice systems, namely lattices of interacting single domain ferromagnetic islands, have been used to date as microscopic models of frustration induced by lattice topology, allowing for the direct visualization of spin arrangements and textures. However, the engineering of frustrated ice states in which individual spins can be manipulated in situ and the real-time observation of their collective dynamics remain both challenging tasks. Inspired by recent theoretical advances, here we realize a colloidal version of an artificial spin ice system using interacting polarizable particles confined to lattices of bistable gravitational traps. We show quantitatively that ice-selection rules emerge in this frustrated soft matter system by tuning the strength of the pair interactions between the microscopic units. Via independent control of particle positioning and dipolar coupling, we introduce monopole-like defects and strings and use loops with defined chirality as an elementary unit to store binary information.