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Article: Observation of Non-Abelian Charged Nodes Linking Nonadjacent Gaps

TitleObservation of Non-Abelian Charged Nodes Linking Nonadjacent Gaps
Authors
Issue Date23-Dec-2022
PublisherAmerican Physical Society
Citation
Physical Review Letters, 2022, v. 129, n. 26, p. 1-7 How to Cite?
Abstract

Nodal links are special configurations of band degeneracies in the momentum space, where nodal line
branches encircle each other. In PT symmetric systems, nodal lines can be topologically characterized
using the eigenvector frame rotations along an encircling loop and the linking structure can be described
with non-Abelian frame charges involving adjacent bands. While the commutation rules between the
frame charges are well established, the underlying relationship between distant band gap closing nodes
remains to be explored. In this Letter, we present a photonic multiple nodal links system, where the
nodal lines of nonadjacent bands are investigated with symmetry constraints on frame charges. Through
an orthogonal nodal chain, the nodal line from the lower two bands predicts the existence of nodal lines
formed between the higher bands. We designed and fabricated a metamaterial, with which the multiple
nodal links and the topological connection between nonadjacent nodal lines are experimentally
demonstrated.


Persistent Identifierhttp://hdl.handle.net/10722/338935
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 3.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, DY-
dc.contributor.authorYang, B-
dc.contributor.authorWang, MD-
dc.contributor.authorZhang, RY-
dc.contributor.authorLi, X-
dc.contributor.authorZhang, ZQ-
dc.contributor.authorZhang, S-
dc.contributor.authorChan, CT-
dc.date.accessioned2024-03-11T10:32:39Z-
dc.date.available2024-03-11T10:32:39Z-
dc.date.issued2022-12-23-
dc.identifier.citationPhysical Review Letters, 2022, v. 129, n. 26, p. 1-7-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/338935-
dc.description.abstract<p>Nodal links are special configurations of band degeneracies in the momentum space, where nodal line<br>branches encircle each other. In PT symmetric systems, nodal lines can be topologically characterized<br>using the eigenvector frame rotations along an encircling loop and the linking structure can be described<br>with non-Abelian frame charges involving adjacent bands. While the commutation rules between the<br>frame charges are well established, the underlying relationship between distant band gap closing nodes<br>remains to be explored. In this Letter, we present a photonic multiple nodal links system, where the<br>nodal lines of nonadjacent bands are investigated with symmetry constraints on frame charges. Through<br>an orthogonal nodal chain, the nodal line from the lower two bands predicts the existence of nodal lines<br>formed between the higher bands. We designed and fabricated a metamaterial, with which the multiple<br>nodal links and the topological connection between nonadjacent nodal lines are experimentally<br>demonstrated.<br></p>-
dc.languageeng-
dc.publisherAmerican Physical Society-
dc.relation.ispartofPhysical Review Letters-
dc.titleObservation of Non-Abelian Charged Nodes Linking Nonadjacent Gaps-
dc.typeArticle-
dc.identifier.doi10.1103/PhysRevLett.129.263604-
dc.identifier.scopuseid_2-s2.0-85144625066-
dc.identifier.volume129-
dc.identifier.issue26-
dc.identifier.spage1-
dc.identifier.epage7-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000906721500007-
dc.identifier.issnl0031-9007-

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