Topolectrical Circuits
Topolectrical Circuits
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DOI：
10.1038/s42005-018-0035-2
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发表时间：
2018-07-23
影响因子：
5.5
通讯作者：
Thomale, Ronny
中科院分区：
文献类型：
--
作者：
Lee, Ching Hua;Imhof, Stefan;Thomale, Ronny
由Alessandro Volta和Felix Savary在世纪早期发明的由电阻、电感和电容（RLC）元件组成的电路在现代技术中无处不在。RLC电路的行为由其电路拉普拉斯算子控制，其类似于描述物理系统的能量学的哈密顿算子。在这里，我们表明，拓扑绝缘和半金属状态可以实现在一个周期性的RLC电路。拓扑边界谐振（TBRs）出现在拓扑电路的阻抗读出，提供了一个强大的信号拓扑导纳带的存在。为了实验说明，我们建立了苏-施里弗-希格电路，在那里我们的阻抗测量检测TBR midgap状态。拓扑电路建立了电气工程和拓扑状态之间的桥梁，其中电子学的可访问性，可扩展性和可操作性与拓扑相的复杂边界特性协同作用。
Invented by Alessandro Volta and Felix Savary in the early 19th century, circuits consisting of resistor, inductor and capacitor (RLC) components are omnipresent in modern technology. The behavior of an RLC circuit is governed by its circuit Laplacian, which is analogous to the Hamiltonian describing the energetics of a physical system. Here we show that topological insulating and semimetallic states can be realized in a periodic RLC circuit. Topological boundary resonances (TBRs) appear in the impedance read-out of a topolectrical circuit, providing a robust signal for the presence of topological admittance bands. For experimental illustration, we build the Su-Schrieffer-Heeger circuit, where our impedance measurement detects the TBR midgap state. Topolectrical circuits establish a bridge between electrical engineering and topological states of matter, where the accessibility, scalability, and operability of electronics synergizes with the intricate boundary properties of topological phases.