Observation of antichiral edge states in a circuit lattice

We construct an electrical circuit to realize a modified Haldane lattice exhibiting the phenomenon of antichiral edge states. The circuit consists of a network of inductors and capacitors with interconnections reproducing the effects of a magnetic vector potential. The next nearest neighbor hoppings...

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Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2021-05, Vol.64 (5), p.257011, Article 257011
Main Authors: Yang, YuTing, Zhu, DeJun, Hang, ZhiHong, Chong, YiDong
Format: Article
Language:English
Subjects:
Analysis
Astronomy
Capacitors
Circuits
Classical and Continuum Physics
Inductors
Magnetic vector potentials
Observations and Techniques
Physics
Physics and Astronomy
Pickup coils
Science
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Summary:We construct an electrical circuit to realize a modified Haldane lattice exhibiting the phenomenon of antichiral edge states. The circuit consists of a network of inductors and capacitors with interconnections reproducing the effects of a magnetic vector potential. The next nearest neighbor hoppings are configured differently from the standard Haldane model, and as predicted by earlier theoretical studies, this gives rise to antichiral edge states that propagate in the same direction on opposite edges and coexist with bulk states at the same frequency. Using pickup coils to measure voltage distributions in the circuit, we experimentally verify the key features of the antichiral edge states, including their group velocities and ability to propagate consistently in a Möbius strip configuration.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-021-1675-0