论文标题
晶格缺陷的无摩擦运动
Frictionless motion of lattice defects
论文作者
论文摘要
快速结晶缺陷的能量耗散主要是通过其核心与周期性晶格的谐振相互作用发生的。我们表明，通过位于人体边界上的适当调谐声源可以将最终的有效摩擦降低至零。为了说明总体思想，我们考虑了三种典型模型，描述了强烈分散缺陷的主要类型：位错，裂缝和域壁。获得的控制方案，可确保拓扑缺陷的无耗散迁移率，也可用于设计旨在传输机械信息的元物质系统。
Energy dissipation by fast crystalline defects takes place mainly through the resonant interaction of their cores with periodic lattice. We show that the resultant effective friction can be reduced to zero by appropriately tuned acoustic sources located on the boundary of the body. To illustrate the general idea, we consider three prototypical models describing the main types of strongly discrete defects: dislocations, cracks and domain walls. The obtained control protocols, ensuring dissipation-free mobility of topological defects, can be also used in the design of meta-material systems aimed at transmitting mechanical information.
