Graphene/h-BN heterostructures under pressure : from van der Waals to covale.

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dc.contributor.authorBarboza, Ana Paula Moreira
dc.contributor.authorSouza, Alan Custodio dos Reis
dc.contributor.authorMatos, Matheus Josué de Souza
dc.contributor.authorBrant, Juliana Caldeira
dc.contributor.authorBarbosa, Tiago Campolina
dc.contributor.authorChacham, Helio
dc.contributor.authorMazzoni, Mário Sérgio de Carvalho
dc.contributor.authorNeves, Bernardo Ruegger Almeida
dc.date.accessioned2020-08-13T14:41:02Z
dc.date.available2020-08-13T14:41:02Z
dc.date.issued2019
dc.description.abstractScanning probe microscopy and ab initio calculations reveal modifications on the electronic and structural properties of graphene/h-BN heterostructures induced by compression. Using AFM and EFM techniques, with charge injection being made in the heterostructures at different pressures, the charge injection efficiency monotonically decreases with increasing pressure for monolayer-graphene (MLG)+BN heterostructures, indicative of a conductor-insulator electronic transition. Bilayer-graphene (BLG)+BN and trilayer-graphene (TLG)+BN heterostructures show a non-monotonic behavior of charge injection versus pressure, indicative of competing electronic structure modifications. First-principle calculations of these systems indicate a pressure-induced van der Waals-to-covalent interlayer transition, where such interlayer covalent binding, in the presence of water molecules, results in a disordered insulating structure for the MLG + BN case, while it leads to an ordered conducting structure for both BLG + BN and TLG + BN heterostructures. These opposing effects may have a strong influence on graphene/h-BN-based electronic devices and their physics under pressurized environments.pt_BR
dc.identifier.citationBARBOZA, A. P. M. et al; Graphene/h-BN heterostructures under pressure: from van der Waals to covale. Carbon, v. 155, p. 108-113, dez. 2019. Disponível em: <https://www.sciencedirect.com/science/article/abs/pii/S0008622319308632>. Acesso em: 03 jul. 2020.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.carbon.2019.08.054pt_BR
dc.identifier.issn0008-6223
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/12585
dc.identifier.uri2https://www.sciencedirect.com/science/article/abs/pii/S0008622319308632pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.titleGraphene/h-BN heterostructures under pressure : from van der Waals to covale.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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