TY  - JOUR
A1  - Lee, Ching Hua
A1  - Imhof, Stefan
A1  - Berger, Christian
A1  - Bayer, Florian
A1  - Brehm, Johannes
A1  - Molenkamp, Laurens W.
A1  - Kiessling, Tobias
A1  - Thomale, Ronny
T1  - Topolectrical Circuits
T2  - Communications Physics
N2  - Invented by Alessandro Volta and Félix 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.
KW  - electronics, photonics and device physics
KW  - topological insulators
Y1  - 2018
UR  - https://opus.bibliothek.uni-wuerzburg.de/opus4-wuerzburg/frontdoor/index/index/docId/23642
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-236422
VL  - 1
ER  -