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dc.contributor.authorSaroka, Vasil
dc.contributor.authorBatrakov, K.G.
dc.contributor.authorDemin, V.A.
dc.contributor.authorChernozatonskii, L.A.
dc.date.accessioned2019-01-09T11:55:10Z
dc.date.available2019-01-09T11:55:10Z
dc.date.created2019-01-08T10:35:54Z
dc.date.issued2015
dc.identifier.citationJournal of Physics: Condensed Matter. 2015, 27 (14), 1-13.nb_NO
dc.identifier.issn0953-8984
dc.identifier.urihttp://hdl.handle.net/11250/2579930
dc.description.abstractBand gap control by an external field is useful in various optical, infrared and THz applications. However, widely tunable band gaps are still not practical due to a variety of reasons. Using the orthogonal tight-binding method for π-electrons, we have investigated the effect of the external electric field on a subclass of monolayer chevron-type graphene nanoribbons that can be referred to as jagged graphene nanoribbons. A classification of these ribbons was proposed and band gaps for applied fields up to the SiO2 breakdown strength (1 V nm−1) were calculated. According to the tight-binding model, band gap opening (or closing) takes place for some types of jagged graphene nanoribbons in the external electric field that lies on the plane of the structure and perpendicular to its longitudinal axis. Tunability of the band gap up to 0.6 eV is attainable for narrow ribbons. In the case of jagged ribbons with armchair edges larger jags forming a chevron pattern of the ribbon enhance the controllability of the band gap. For jagged ribbons with zigzag and armchair edges regions of linear and quadratic dependence of the band gap on the external electric field can be found that are useful in devices with controllable modulation of the band gap.nb_NO
dc.language.isoengnb_NO
dc.publisherIOPnb_NO
dc.relation.urihttp://iopscience.iop.org/article/10.1088/0953-8984/27/14/145305
dc.titleBand gaps in jagged and straight graphene nanoribbons tunable by an external electric fieldnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber1-13nb_NO
dc.source.volume27nb_NO
dc.source.journalJournal of Physics: Condensed Matternb_NO
dc.source.issue14nb_NO
dc.identifier.doi10.1088/0953-8984/27/14/145305
dc.identifier.cristin1652085
dc.description.localcodeThis is an author-created, un-copyedited version of an article accepted for publication/published in [Journal of Physics: Condensed Matter]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/0953-8984/27/14/145305nb_NO
cristin.unitcode194,66,20,0
cristin.unitnameInstitutt for fysikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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