dc.contributor.author Peng, Bo dc.contributor.author Bouhon, Adrien dc.contributor.author Monserrat Sanchez, Bartomeu dc.contributor.author Slager, Robert-Jan dc.date.accessioned 2022-01-07T00:30:48Z dc.date.available 2022-01-07T00:30:48Z dc.identifier.issn 2041-1723 dc.identifier.uri https://www.repository.cam.ac.uk/handle/1810/332249 dc.description.abstract Topological phases of matter have revolutionised the fundamental understanding of band theory and hold great promise for next-generation technologies such as low-power electronics or quantum computers. Single-gap topologies have been extensively explored, and a large number of materials have been theoretically proposed and experimentally observed. These ideas have recently been extended to multi-gap topologies with band nodes that carry non-Abelian charges, characterised by invariants that arise by the momentum space braiding of such nodes. However, the constraints placed by the Fermi-Dirac distribution to electronic systems have so far prevented the experimental observation of multi-gap topologies in real materials. Here, we show that multi-gap topologies and the accompanying phase transitions driven by braiding processes can be readily observed in the bosonic phonon spectra of known monolayer silicates. The associated braiding process can be controlled by means of an electric field and epitaxial strain, and involves, for the first time, more than three bands. Finally, we propose that the band inversion processes at the $\Gamma$ point can be tracked by following the evolution of the Raman spectrum, providing a clear signature for the experimental verification of the band inversion accompanied by the braiding process. dc.publisher Nature Research dc.rights Creative Commons CC BY 4.0 dc.rights.uri http://www.rioxx.net/licenses/CC BY 4.0 dc.subject cond-mat.mes-hall dc.subject cond-mat.mes-hall dc.subject cond-mat.mtrl-sci dc.subject physics.comp-ph dc.title Phonons as a platform for non-Abelian braiding and its manifestation in layered silicates dc.type Article dc.publisher.department Department of Materials Science And Metallurgy dc.publisher.department Department of Physics dc.date.updated 2022-01-05T15:47:34Z prism.publicationName Nature Communications dc.identifier.doi 10.17863/CAM.79694 dcterms.dateAccepted 2022-01-05 rioxxterms.version VoR dc.contributor.orcid Monserrat Sanchez, Bartomeu [0000-0002-4233-4071] dc.contributor.orcid Slager, Robert-Jan [0000-0001-9055-5218] rioxxterms.type Journal Article/Review cam.orpheus.success 2022-05-18 cam.orpheus.counter 6 * cam.depositDate 2022-01-05 pubs.licence-identifier apollo-deposit-licence-2-1 pubs.licence-display-name Apollo Repository Deposit Licence Agreement
﻿