Observation of Photonic Chern Metal With Bi‐Chiral Edge Propagation
Abstract: The recent discovery of anti‐chiral edge states in magnetic semimetals linking two unequal‐frequency bulk Dirac nodes manifests a paradoxical picture in contrast to the chiral behavior in Chern insulators, implying an untapped phase may exist. Here, a unique Chern metal, exhibiting a nontrivial Chern number but without a complete bandgap is proposed, and the complete topological phase diagram in the modified Haldane model is obtained. Subsequently, the Chern metal in a 2D honeycomb‐lattice gyromagnetic photonic crystal by simultaneously breaking parity and time‐reversal symmetries with opposite and unequal magnetic biases at different sublattices is realized. For the paired complementary‐shape boundaries, such as zigzag/bearded, it is experimentally revealed that either clockwise or counter‐clockwise chiral character is switchable in Chern metals relying on different boundary choices, a remarkable property deemed as bi‐chiral edge propagation. The topological Chern metal with hidden bulk‐boundary correspondence is articulated to bridge the chiral and anti‐chiral paradox gap between Chern insulators and magnetic semimetals. These results enrich the family of Chern materials and highlight the previously untapped on‐demand control of topological edge states.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Observation of Photonic Chern Metal With Bi‐Chiral Edge Propagation ; day:17 ; month:08 ; year:2024 ; extent:8
Laser & photonics reviews ; (17.08.2024) (gesamt 8)
- Creator
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Zhou, Yan‐Chen
Sun, Ze‐Qun
Lai, Hua‐Shan
Sun, Xiao‐Chen
He, Cheng
Chen, Yan‐Feng
- DOI
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10.1002/lpor.202400826
- URN
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urn:nbn:de:101:1-2408181413321.286991545332
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:43 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Zhou, Yan‐Chen
- Sun, Ze‐Qun
- Lai, Hua‐Shan
- Sun, Xiao‐Chen
- He, Cheng
- Chen, Yan‐Feng
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