Acoustic realization of projective mirror Chern insulators
Abstract Symmetry plays a key role in classifying topological phases. Recent theory shows that in the presence of gauge fields, the algebraic structure of crystalline symmetries needs to be projectively represented, which brings extra chance for topological physics. Here, we report a concrete acoust...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-09-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-023-01393-9 |
| _version_ | 1827710673677713408 |
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| author | Tianzi Li Luohong Liu Qicheng Zhang Chunyin Qiu |
| author_facet | Tianzi Li Luohong Liu Qicheng Zhang Chunyin Qiu |
| author_sort | Tianzi Li |
| collection | DOAJ |
| description | Abstract Symmetry plays a key role in classifying topological phases. Recent theory shows that in the presence of gauge fields, the algebraic structure of crystalline symmetries needs to be projectively represented, which brings extra chance for topological physics. Here, we report a concrete acoustic realization of mirror Chern insulators by exploiting the concept of projective symmetry. Specifically, we introduce a simple but universal recipe for constructing projective mirror symmetry, and conceive a minimal model for achieving the projective symmetry-enriched mirror Chern insulators. Based on our selective-excitation measurements, we demonstrate unambiguously the projective mirror eigenvalue-locked topological nature of the bulk states and associated chiral edge states. We extract the non-abelian Berry curvature and identify the mirror Chern number directly, providing experimental evidence for this exotic topological phase. All experimental results agree well with the theoretical predictions. Our findings give insights into topological systems equipped with gauge fields. |
| first_indexed | 2024-03-10T17:42:08Z |
| format | Article |
| id | doaj.art-d20adc1b4ba24912a71fd62dafad533f |
| institution | Directory Open Access Journal |
| issn | 2399-3650 |
| language | English |
| last_indexed | 2024-03-10T17:42:08Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj.art-d20adc1b4ba24912a71fd62dafad533f2023-11-20T09:40:27ZengNature PortfolioCommunications Physics2399-36502023-09-01611910.1038/s42005-023-01393-9Acoustic realization of projective mirror Chern insulatorsTianzi Li0Luohong Liu1Qicheng Zhang2Chunyin Qiu3Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan UniversityKey Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan UniversityKey Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan UniversityKey Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan UniversityAbstract Symmetry plays a key role in classifying topological phases. Recent theory shows that in the presence of gauge fields, the algebraic structure of crystalline symmetries needs to be projectively represented, which brings extra chance for topological physics. Here, we report a concrete acoustic realization of mirror Chern insulators by exploiting the concept of projective symmetry. Specifically, we introduce a simple but universal recipe for constructing projective mirror symmetry, and conceive a minimal model for achieving the projective symmetry-enriched mirror Chern insulators. Based on our selective-excitation measurements, we demonstrate unambiguously the projective mirror eigenvalue-locked topological nature of the bulk states and associated chiral edge states. We extract the non-abelian Berry curvature and identify the mirror Chern number directly, providing experimental evidence for this exotic topological phase. All experimental results agree well with the theoretical predictions. Our findings give insights into topological systems equipped with gauge fields.https://doi.org/10.1038/s42005-023-01393-9 |
| spellingShingle | Tianzi Li Luohong Liu Qicheng Zhang Chunyin Qiu Acoustic realization of projective mirror Chern insulators Communications Physics |
| title | Acoustic realization of projective mirror Chern insulators |
| title_full | Acoustic realization of projective mirror Chern insulators |
| title_fullStr | Acoustic realization of projective mirror Chern insulators |
| title_full_unstemmed | Acoustic realization of projective mirror Chern insulators |
| title_short | Acoustic realization of projective mirror Chern insulators |
| title_sort | acoustic realization of projective mirror chern insulators |
| url | https://doi.org/10.1038/s42005-023-01393-9 |
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