论文标题
在错位界面上的声音弹性板和螺旋边缘状态中的合成kramers对
Synthetic Kramers pair in phononic elastic plates and helical edge states on a dislocation interface
论文作者
论文摘要
在常规理论中，拓扑结构特性是大量材料的内在特征，不取决于参考框架的选择。在这种情况下，可以使用散装对应关系的原理来预测拓扑不同材料之间的边缘状态的存在。在这项研究中，我们提出并仔细检查了一个2D弹性语音板，上面刻有kekulé的蜂窝图案。发现伪植物和伪依赖性依赖的Chern号不是不变的属性，而$ \ Mathbb {z} _2 $数字不再是检查边缘状态的存在的足够指标。还揭示了独特的假蛋白纹理和伪磁场。最后，我们成功地设计并实现了与相对翻译相同的两个子域的位错接口上的合成螺旋边缘状态。还通过激光振动法对边缘状态进行成像。
In conventional theories, topological band properties are intrinsic characteristics of the bulk material and do not depend on the choice of the reference frame. In this scenario, the principle of bulk-edge correspondence can be used to predict the existence of edge states between topologically distinct materials. In this study, we propose and carefully examine a 2D elastic phononic plate with a Kekulé-distorted honeycomb pattern engraved on it. It is found that the pseudospin and the pseudospin-dependent Chern numbers are not invariant properties, and the $\mathbb{Z}_2$ number is no longer a sufficient indicator to examine the existence of the edge state. The distinctive pseudospin texture and the pseudomagnetic field are also revealed. Finally, we successfully devise and experimentally implement the synthetic helical edge states on a dislocation interface connecting two subdomains with bulk pattern identical up to a relative translation. The edge state is also imaged via laser vibrometry.
