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Mixed-Stacking Few-Layer Graphene as an Elemental Weak Ferroelectric Material

[Image: see text] Ferroelectricity ( J. ValasekPhys. Rev.1921, 17, 475), a spontaneous formation of electric polarization, is a solid state phenomenon, usually, associated with ionic compounds or complex materials. Here we show that, atypically for elemental solids, few-layer graphenes can host an e...

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Detalles Bibliográficos
Autores principales: Garcia-Ruiz, Aitor, Enaldiev, Vladimir, McEllistrim, Andrew, Fal’ko, Vladimir I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10214444/
https://www.ncbi.nlm.nih.gov/pubmed/37158207
http://dx.doi.org/10.1021/acs.nanolett.2c04723
Descripción
Sumario:[Image: see text] Ferroelectricity ( J. ValasekPhys. Rev.1921, 17, 475), a spontaneous formation of electric polarization, is a solid state phenomenon, usually, associated with ionic compounds or complex materials. Here we show that, atypically for elemental solids, few-layer graphenes can host an equilibrium out-of-plane electric polarization, switchable by sliding the constituent graphene sheets. The systems hosting such effect include mixed-stacking tetralayers and thicker (5–9 layers) rhombohedral graphitic films with a twin boundary in the middle of a flake. The predicted electric polarization would also appear in marginally (small-angle) twisted few-layer flakes, where lattice reconstruction would give rise to networks of mesoscale domains with alternating value and sign of out-of-plane polarization.