Current flow in biased bilayer graphene: Role of sublattices

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dc.contributor.authorPaez C.J.
dc.contributor.authorBahamon D.A.
dc.contributor.authorPereira A.L.C.
dc.date.accessioned2024-03-13T01:00:07Z
dc.date.available2024-03-13T01:00:07Z
dc.date.issued2014
dc.description.abstract© 2014 American Physical Society.We investigate here how the current flows over a bilayer graphene in the presence of an external electric field perpendicularly applied (biased bilayer). Charge density polarization between layers in these systems is known to create a layer pseudospin, which can be manipulated by the electric field. Our results show that current does not necessarily flow over regions of the system with higher charge density. Charge can be predominantly concentrated over one layer, while current flows over the other layer. We find that this phenomenon occurs when the charge density becomes highly concentrated over only one of the sublattices, as the electric field breaks layer and sublattice symmetries for a Bernal-stacked bilayer. For bilayer nanoribbons, the situation is even more complex, with a competition between edge and bulk effects for the definition of the current flow. We show that, in spite of not flowing trough the layer where charge is polarized to, the current in these systems also defines a controllable layer pseudospin.
dc.description.issuenumber12
dc.description.volume90
dc.identifier.doi10.1103/PhysRevB.90.125426
dc.identifier.issn1098-0121
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36362
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physics
dc.rightsAcesso Restrito
dc.titleCurrent flow in biased bilayer graphene: Role of sublattices
dc.typeArtigo
local.scopus.citations6
local.scopus.eid2-s2.0-84907246964
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84907246964&origin=inward
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