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dc.contributor.authorZhou, Weijian
dc.contributor.authorChen, Weiqiu
dc.contributor.authorDestrade, Michel
dc.contributor.authorLim, C.W.
dc.date.accessioned2020-12-07T09:20:19Z
dc.date.issued2020-05-01
dc.identifier.citationZhou, Weijian, Chen, Weiqiu, Destrade, Michel, & Lim, C. W. (2020). Actively controllable topological phase transition in phononic beam systems. International Journal of Mechanical Sciences, 180, doi:https://doi.org/10.1016/j.ijmecsci.2020.105668en_IE
dc.identifier.issn0020-7403
dc.identifier.urihttp://hdl.handle.net/10379/16364
dc.description.abstractTopological insulators, which allow edge or interface waves but forbid bulk waves, have revolutionized our scientific cognition of acoustic/elastic systems. Due to their nontrivial topological characteristics, edge (interface) waves are topologically protected against defects and disorders. This superior and unique characteristic could lead to a wealth of new opportunities in applications of quantum and acoustic/elastic information processing. However, current acoustic/elastic topological insulators are still at an infancy stage where the theory and prediction only work in laboratories and there are still many problems left open before promoting their practical applications. One of the apparent disadvantages is their narrow working frequency range, which is the main concern in this paper. We design a one-dimensional phononic beam system made of a homogeneous epoxy central beam sandwiched by two homogeneous piezoelectric beams, and covered with extremely thin electrodes, periodically and separately placed. These electrodes are connected to external electric circuits with negative capacitors. We show that a topological phase transition can be induced and tuned by changing the values of the negative capacitors. It follows that the working frequency of the topologically protected interface mode can be widely changed, such that the working frequency range of the topological insulator can be considerably 'broadened'. This intelligent topological device may also find wide applications in intelligent technologies that need controllable information processing of high precision.en_IE
dc.description.sponsorshipThe work described in this paper was supported by PROCORE-France/Hong Kong Joint Research Scheme (Project No. FCityU108/17) and National Natural Science Foundation of China (Nos. 11532001 and 11621062).en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofInternational Journal Of Mechanical Sciencesen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectActive controlen_IE
dc.subjectBand gapsen_IE
dc.subjectNegative capacitoren_IE
dc.subjectTopological phase transitionen_IE
dc.subjectWAVESen_IE
dc.subjectPROPAGATIONen_IE
dc.subjectBEHAVIORen_IE
dc.titleActively controllable topological phase transition in phononic beam systemsen_IE
dc.typeArticleen_IE
dc.date.updated2020-12-05T19:03:55Z
dc.identifier.doi10.1016/j.ijmecsci.2020.105668
dc.local.publishedsourcehttps://doi.org/10.1016/j.ijmecsci.2020.105668en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderNational Natural Science Foundation of Chinaen_IE
dc.contributor.funderFrance/Hong Kong Joint Research Schemeen_IE
dc.description.embargo2022-05-01
dc.internal.rssid21718058
dc.local.contactMichel Destrade, Room Adb-1002, Áras De Brun, School Of Mathematics, Nui Galway. 2344 Email: michel.destrade@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionACCEPTED
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