通过惯性锚实现巨大的平带放大
Giant Flat Band Amplification via Inertial Anchors
AI总结：
研究通过对经典晶格结构进行惯性改造实现弹性平带，改变晶胞几何形状形成惯性锚网络，分割晶格为弱耦合谐振器阵列。激光测振实验揭示该机制有放大倍数高、多晶胞激活与源位置无关及有持久瞬态响应等特征。
AI中文摘要：
在电子材料中，平带与紧密的电子局域化相关，对超导、铁磁和强关联系统有影响。而弹性介质中类似物的物理意义却鲜为人知。本文报告了一种通过对经典晶格结构进行惯性改造来实现弹性平带的策略。通过改变晶胞几何形状实现惯性锚网络，将晶格有效分割成弱耦合的新兴谐振器阵列，其共振在声子谱中表现为平带。展示了兼具局域和扩展态属性的平带条件，并引发了时空持久的巨大响应。激光测振实验揭示了该机制的三个特征：与通带和带隙条件相比放大高达两个数量级、多晶胞激活与源位置无关、即使经过多次激发循环仍有持久瞬态响应。
英文摘要：
In electronic materials, flat bands are associated with compact electron localization, with implications for superconductivity, ferromagnetism and strongly correlated systems. The physical significance of their counterparts in elastic media is far less charted. Here we report a strategy to achieve elastic flat bands through an inertial retrofitting of classical lattice architectures. The idea is to alter the cell geometry to realize a network of inertial anchors, effectively partitioning the lattice into an array of weakly coupled emergent resonators, whose resonances appear as flat bands in the phonon spectrum. We demonstrate flat-band conditions that combine localized and extended state attributes and induce a giant response that is spatially and temporally persistent. Laser vibrometry experiments reveal three signatures of this mechanism: amplification up to two orders of magnitude compared to pass band and band gap conditions, multi-cell activation that is agnostic to the source location, and a persistent transient response even after several excitation cycles.
