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Article: Octupole corner state in a three-dimensional topological circuit

TitleOctupole corner state in a three-dimensional topological circuit
Authors
Issue Date2020
Citation
Light: Science and Applications, 2020, v. 9, n. 1, article no. 145 How to Cite?
AbstractHigher-order topological insulators (HOTIs) represent a new family of topological materials featuring quantized bulk polarizations and zero-dimensional corner states. In recent years, zero-dimensional corner states have been demonstrated in two-dimensional systems in the form of quadrupole modes or dipole modes. Due to the challenges in designing and constructing three-dimensional systems, octupole corner modes in 3D have not been observed. In this work, we experimentally investigate octupole topological phases in a three-dimensional electrical circuit, which can be viewed as a cubic lattice version of the Hofstadter model with a π-flux threading each plaquette. We experimentally observe in our higher-order topological circuit a 0D corner state manifested as a localized impedance peak. The observed corner state in the electrical circuit is induced by the octupole moment of the bulk circuit and is topologically protected by anticommuting spatial symmetries of the circuit lattice. Our work provides a platform for investigating higher-order topological effects in three-dimensional electrical circuits.
Persistent Identifierhttp://hdl.handle.net/10722/295176
ISSN
2023 Impact Factor: 20.6
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, Shuo-
dc.contributor.authorMa, Shaojie-
dc.contributor.authorZhang, Qian-
dc.contributor.authorZhang, Lei-
dc.contributor.authorYang, Cheng-
dc.contributor.authorYou, Oubo-
dc.contributor.authorGao, Wenlong-
dc.contributor.authorXiang, Yuanjiang-
dc.contributor.authorCui, Tie Jun-
dc.contributor.authorZhang, Shuang-
dc.date.accessioned2021-01-05T04:59:13Z-
dc.date.available2021-01-05T04:59:13Z-
dc.date.issued2020-
dc.identifier.citationLight: Science and Applications, 2020, v. 9, n. 1, article no. 145-
dc.identifier.issn2095-5545-
dc.identifier.urihttp://hdl.handle.net/10722/295176-
dc.description.abstractHigher-order topological insulators (HOTIs) represent a new family of topological materials featuring quantized bulk polarizations and zero-dimensional corner states. In recent years, zero-dimensional corner states have been demonstrated in two-dimensional systems in the form of quadrupole modes or dipole modes. Due to the challenges in designing and constructing three-dimensional systems, octupole corner modes in 3D have not been observed. In this work, we experimentally investigate octupole topological phases in a three-dimensional electrical circuit, which can be viewed as a cubic lattice version of the Hofstadter model with a π-flux threading each plaquette. We experimentally observe in our higher-order topological circuit a 0D corner state manifested as a localized impedance peak. The observed corner state in the electrical circuit is induced by the octupole moment of the bulk circuit and is topologically protected by anticommuting spatial symmetries of the circuit lattice. Our work provides a platform for investigating higher-order topological effects in three-dimensional electrical circuits.-
dc.languageeng-
dc.relation.ispartofLight: Science and Applications-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleOctupole corner state in a three-dimensional topological circuit-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41377-020-00381-w-
dc.identifier.pmid32864120-
dc.identifier.pmcidPMC7438484-
dc.identifier.scopuseid_2-s2.0-85089596833-
dc.identifier.volume9-
dc.identifier.issue1-
dc.identifier.spagearticle no. 145-
dc.identifier.epagearticle no. 145-
dc.identifier.eissn2047-7538-
dc.identifier.isiWOS:000565608400004-
dc.identifier.issnl2047-7538-

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