论文标题
四极表面半金属的面向电流
Topolectrical-circuit realization of quadrupolar surface semimetals
论文作者
论文摘要
最近的研究表明，有两种类型的拓扑四极半法。一个是四极散装半学，这是一个常规的半学，在整体频谱中带有无间隙节点。另一种类型的命名为四极表面半学，在表面光谱上具有散布的大体但无间隙节点。关于实施四极块半法，有许多实验。但是，四极表面半学从未实现。在这里，我们报告了电路系统中四极表面半学的实验实现。为了强调四极表面半学的特性，我们还准备了电路中的四极体积半学作为对比度。已经证明，四极表面半学具有散装带隙，但表面上出现了两个无间隙节点。同样，电子不仅集中在铰链上，而且集中在相应的表面上。我们的研究提供了控制电信号的新颖方法，并可能在相互作用的电路设计领域具有潜在的应用。
Recent studies have shown that there are two types of topological quadrupolar semimetals. One is the quadrupolar bulk semimetal, which is a conventional semimetal with gapless nodes in the bulk spectrum. The other type is named the quadrupolar surface semimetal, possessing a gapped bulk but gapless nodes on the surface spectrum. There have been many experiments on the implementation of quadrupolar bulk semimetals. However, the quadrupolar surface semimetal has never been realized. Here we report on the experimental realization of the quadrupolar surface semimetal in the circuit system. To highlight the properties of the quadrupolar surface semimetal, we also prepare a quadrupolar bulk semimetal in the circuit as a contrast. It has been demonstrated that the quadrupolar surface semimetal has a bulk band gap, but two gapless nodes appear on the surfaces. Also, the electrons not only concentrate on the hinges but also on the corresponding surfaces. Our studies provide novel ways to control electrical signals and may have potential applications in the field of intergraded circuit design.
