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

Autor:	Garcia-Ruiz, Aitor, Enaldiev, Vladimir, McEllistrim, Andrew, Fal'ko, Vladimir I.
Rok vydání:	2023
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Nano Lett. 2023, 23, 10
Druh dokumentu:	Working Paper
DOI:	10.1021/acs.nanolett.2c04723
Popis:	Ferroelectricity (Valasek, J. Phys. Rev. 1921, 17, 475) - a spontaneous formation of electric polarisation - 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 polarisation, 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 polarisation 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 polarisation. Comment: 25 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.10896 Zobrazit plný text záznamu View this record from Arxiv