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Electromechanical response at polar zigzag boundaries in hybrid monolayers

AutorMartínez-Gordillo, Rafael; Pruneda, Miguel
Fecha de publicación2015
EditorAmerican Physical Society
CitaciónPhysical Review B 91(4): 045411 (2015)
ResumenFirst-principles calculations are used to demonstrate electromechanical control of charge and spin at zigzag-edged interfaces between graphene and boron-nitride domains in hybrid monolayers. We show how, through a direct piezoelectric effect, the interfacial bound charges and associated electric fields can be tuned by application of an external mechanical force (stress) on the system. This results in mechanical control of the edge magnetization (piezomagnetic effect), and the possibility to transform a semiconducting heterostructure into a half-metal. The inverse effect (application of an external electric field to induce a mechanical deformation) goes together with a magnetoelectric response, which under ideal conditions we estimate to be comparable to that of prototypical Cr2O3. These effects originate from the magnetic properties of graphene's zigzag edges and the dielectric properties of the boron-nitride domain, and can also be expected in any other coplanar heterostructures with polar discontinuities.
DescripciónUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.91.045411
Identificadoresdoi: 10.1103/PhysRevB.91.045411
issn: 1098-0121
e-issn: 1550-235X
Aparece en las colecciones: (CIN2) Artículos
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