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Observation of an a...
Observation of an acoustic topological Euler insulator with meronic waves
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- Jiang, Bin (författare)
- Univ Sci & Technol China, Suzhou Inst Adv Res, Suzhou 215123, Peoples R China.;Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China.;Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China.
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- Bouhon, Adrien (författare)
- Nordita SU; Univ Cambridge, Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England.;Stockholm Univ, NORDITA, SE-10691 Stockholm, Sweden
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- Wu, Shi-Qiao (författare)
- Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China.;Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China.
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- Kong, Ze-Lin (författare)
- Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China.;Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China.
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- Lin, Zhi-Kang (författare)
- Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China.;Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China.
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- Slager, Robert-Jan (författare)
- Univ Cambridge, Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England.
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- Jiang, Jian-Hua (författare)
- Univ Sci & Technol China, Suzhou Inst Adv Res, Suzhou 215123, Peoples R China.;Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China.;Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China.
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Univ Sci & Technol China, Suzhou Inst Adv Res, Suzhou 215123, Peoples R China;Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China.;Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China. Nordita SU; Univ Cambridge, Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England.;Stockholm Univ, NORDITA, SE-10691 Stockholm, Sweden (creator_code:org_t)
- Elsevier BV, 2024
- 2024
- Engelska.
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Ingår i: Science Bulletin. - : Elsevier BV. - 2095-9273. ; 69:11, s. 1653-1659
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Topological band theory has conventionally been concerned with the topology of bands around a single gap. Only recently non-Abelian topologies that thrive on involving multiple gaps were studied, unveiling a new horizon in topological physics beyond the conventional paradigm. Here, we report on the first experimental realization of a topological Euler insulator phase with unique meronic characterization in an acoustic metamaterial. We demonstrate that this topological phase has several nontrivial features: First, the system cannot be described by conventional topological band theory, but has a nontrivial Euler class that captures the unconventional geometry of the Bloch bands in the Brillouin zone. Second, we uncover in theory and probe in experiments a meronic configuration of the bulk Bloch states for the first time. Third, using a detailed symmetry analysis, we show that the topological Euler insulator evolves from a non-Abelian topological semimetal phase via. the annihilation of Dirac points in pairs in one of the band gaps. With these nontrivial properties, we establish concretely an unconventional bulk-edge correspondence which is confirmed by directly measuring the edge states via. pump-probe techniques. Our work thus unveils a nontrivial topological Euler insulator phase with a unique meronic pattern and paves the way as a platform for non-Abelian topological phenomena.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- Euler insulators
- Meronic waves
- Acoustic metamaterials
- Topological phases of matter
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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