论文标题
螺旋弹性山谷超材料中的拓扑过渡
Topological transition in spiral elastic valley metamaterials
论文作者
论文摘要
弹性谷超材料为操纵弹性波提供了一个极好的平台，并在能量收集和弹性中具有潜在的应用。在这里，我们介绍了一系列策略，以通过参数调制来实现螺旋弹性谷超材料中的拓扑过渡。我们显示了浆果曲率和山谷Chern数的演变，这是螺旋固有参数的函数，这进一步导致了实现拓扑山谷边缘状态的一般方案。我们的策略利用螺旋弹性山谷的多个自由度，为所需的拓扑状态提供了增强的机会。
Elastic valley metamaterials offer an excellent platform to manipulate elastic waves and have potential applications in energy harvesting and elastography. Here we introduce a series of strategies to realize topological transition in spiral elastic valley metamaterials by parameter modulations. We show the evolution of Berry curvature and valley Chern number as a function of inherent parameters of spiral, which further results in a general scheme to achieve topological valley edge states. Our strategy leverages multiple degrees of freedom in spiral elastic valley metamaterials to provide enhanced opportunities for desired topological states.
