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Topological valley currents via ballistic edge modes in graphene superlattices near the primary Dirac point
dc.contributor.authorLi, Yang
dc.contributor.authorAmado Montero, Mario 
dc.contributor.authorHyart, Timo
dc.contributor.authorMazur, Grzegorz. P.
dc.contributor.authorRobinson, Jason W. A.
dc.date.accessioned2026-01-15T09:09:48Z
dc.date.available2026-01-15T09:09:48Z
dc.date.issued2020
dc.identifier.citationLi, Y., Amado, M., Hyart, T. et al. Topological valley currents via ballistic edge modes in graphene superlattices near the primary Dirac point. Commun Phys 3, 224 (2020). https://doi.org/10.1038/s42005-020-00495-yes_ES
dc.identifier.urihttp://hdl.handle.net/10366/168806
dc.description.abstract[EN]Graphene on hexagonal boron nitride (hBN) can exhibit a topological phase via mutual crystallographic alignment. Recent measurements of nonlocal resistance (Rnl) near the secondary Dirac point (SDP) in ballistic graphene/hBN superlattices have been interpreted as arising due to the quantum valley Hall state. We report hBN/graphene/hBN superlattices in which Rnl at SDP is negligible, but below 60 K approaches the value of h/2e2 in zero magnetic field at the primary Dirac point with a characteristic decay length of 2 μm. Furthermore, nonlocal transport transmission probabilities based on the Landauer-Büttiker formalism show evidence for spin-degenerate ballistic valley-helical edge modes, which are key for the development of valleytronics.es_ES
dc.description.sponsorshipThe research was funded by the Royal Society and the EPSRC through an EPSRC-JSPS International Network Grant (EP/P026311/1). Y.L. was supported through China Scholarship Council (CSC) Cambridge International Scholarship and Cambridge Trust. M.A. was supported from the MSCA-IFEF-ST Marie Curie (Grant 656485-Spin3), the Agencia Estatal de Investigación of Spain (Grant MAT2016-75955), and the Junta de Castilla y León (Grant SA256P18). T.H. and G.P.M. were supported by the Foundation for Polish Science through the IRA Programme co-financed by EU within SG OP. G.P.M. was supported by the National Science Center (Poland) through ETIUDA fellowship (Grant No. UMO-2017/24/T/ST3/00501).es_ES
dc.format.mimetypeapplication/pdf
dc.language.isoenges_ES
dc.publisherSpringer Naturees_ES
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectGraphene superlatticeses_ES
dc.subjectPrimary Dirac pointes_ES
dc.titleTopological valley currents via ballistic edge modes in graphene superlattices near the primary Dirac pointes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publishversionhttps://doi.org/10.1038/s42005-020-00495-yes_ES
dc.identifier.doi10.1038/s42005-020-00495-y
dc.relation.projectIDMSCA-IFEF-ST Marie Curie (Grant 656485-Spin3)es_ES
dc.relation.projectIDAgencia Estatal de Investigación of Spain (Grant MAT2016-75955), and the Junta de Castilla y León (Grant SA256P18)es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.essn2399-3650
dc.journal.titleCommunications Physicses_ES
dc.volume.number3es_ES
dc.issue.number1es_ES
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones_ES


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