Knitting topological bands in artificial sonic semimetals

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dc.contributor.author Zheng, Li-Yang
dc.contributor.author Zhang, Xiu-Juan
dc.contributor.author Lu, Ming-Hui
dc.contributor.author Chen, Yan-Feng
dc.contributor.author Christensen, Johan
dc.date.accessioned 2020-12-10T14:47:33Z
dc.date.issued 2021-01-01
dc.identifier.bibliographicCitation Materials Today Physics, (2021), v. 16, 100299, pp.: 1-6.
dc.identifier.issn 2542-5293
dc.identifier.uri http://hdl.handle.net/10016/31570
dc.description.abstract Frontier investigations on a contemporary family of materials comprise a new class of topological materials that have been discovered in three dimensional (3D) semimetallic crystals. Beyond already unconventional topological quasiparticles in Dirac and Weyl semimetals, nodal-line semimetals provide an even richer platform encompassing robust band-touching manifolds and exotic transport properties. Classical configurations including artificial crystals have emerged as popular systems not only to replicate these new properties in wave-based scenarios, but particularly also to ease experimental complexities of electronic systems and to permit topological tuning via variable geometrical designs. Sonic crystals are one of such example, in which dissimilar fluid or rigid inclusions or channels are combined to tailor the acoustic material response at will. Here, we design a cubic lattice of guiding channels allowing us to map topological characteristics of quasi-particles excitations to audible sound properties. Simply by varying the cross section of these channels, we bring forward multiple phase transitions among four different interlaced nodal features, which resemble the knitting of 3D Bloch-bulk bands in momentum space. One nodal attribute appears to feature an acoustic version of directional massless Dirac fermions, which is experimentally characterized and displays linear crossing in one direction and flat bands in the perpendicular one, enabling strongly focused and collimated sound beams, thanks to this peculiar dispersion.
dc.description.sponsorship J.C. acknowledges the support from the European Research Council (ERC) through the Starting Grant No. 714577 PHONOMETA and from the MINECO through a Ramón y Cajal grant (Grant No. RYC-2015-17156). X.J.Z. M.H.L. and Y.F.C. acknowledge the support from the National Key R & D Program of China (2017YFA0303702, 2018YFA0306200), the National Natural Science Foundation of China (Grant No. 51902151, 11625418, 11890700, 51732006 and 51902151), the Natural Science Foundation of Jiangsu Province (Grant No. BK20190284) and the Fundamental Research Funds for the Central Universities (14380165).
dc.format.extent 6
dc.language.iso eng
dc.publisher American Physical Society
dc.rights © 2020 Elsevier Ltd. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Three dimensional (3d) semimetallic crystals
dc.subject.other Acoustic 3d cubic structure
dc.subject.other Sound wave techniques
dc.subject.other Topological insulators
dc.subject.other Topological materials
dc.title Knitting topological bands in artificial sonic semimetals
dc.type article
dc.description.status Publicado
dc.subject.eciencia Física
dc.subject.eciencia Materiales
dc.identifier.doi https://doi.org/10.1016/j.mtphys.2020.100299
dc.rights.accessRights embargoedAccess
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/714577/PHONOMETA
dc.relation.projectID Gobierno de España. RYC2015-17156
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationlastpage 6
dc.identifier.publicationtitle Materials Today Physics
dc.identifier.publicationvolume 16, 100299
dc.identifier.uxxi AR/0000026430
carlosiii.embargo.liftdate 2023-01-01
carlosiii.embargo.terms 2023-01-01
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder European Commission
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