The discovery of superconductivity and correlated electronic states in the flat bands of twisted bilayer graphene has raised a lot of excitement. Flat bands also occur in multilayer graphene flakes that present rhombohedral (ABC) stacking order on many consecutive layers. Although Bernal-stacked (AB) graphene is more stable, long-range ABC-ordered flakes involving up to 50 layers have been surprisingly observed in natural samples. Here, we present a microscopic atomistic model, based on first-principles density functional theory calculations, that demonstrates how shear stress can produce long-range ABC order. A stress-angle phase diagram shows under which conditions ABC-stacked graphene can be obtained, providing an experimental guide for its synthesis.

Long-Range Rhombohedral-Stacked Graphene through Shear / Nery, Jean Paul; Calandra, Matteo; Mauri, Francesco. - In: NANO LETTERS. - ISSN 1530-6984. - 20:7(2020), pp. {5017-5023}. [10.1021/acs.nanolett.0c01146]

Long-Range Rhombohedral-Stacked Graphene through Shear

Mauri, Francesco
2020

Abstract

The discovery of superconductivity and correlated electronic states in the flat bands of twisted bilayer graphene has raised a lot of excitement. Flat bands also occur in multilayer graphene flakes that present rhombohedral (ABC) stacking order on many consecutive layers. Although Bernal-stacked (AB) graphene is more stable, long-range ABC-ordered flakes involving up to 50 layers have been surprisingly observed in natural samples. Here, we present a microscopic atomistic model, based on first-principles density functional theory calculations, that demonstrates how shear stress can produce long-range ABC order. A stress-angle phase diagram shows under which conditions ABC-stacked graphene can be obtained, providing an experimental guide for its synthesis.
2020
graphene
01 Pubblicazione su rivista::01a Articolo in rivista
Long-Range Rhombohedral-Stacked Graphene through Shear / Nery, Jean Paul; Calandra, Matteo; Mauri, Francesco. - In: NANO LETTERS. - ISSN 1530-6984. - 20:7(2020), pp. {5017-5023}. [10.1021/acs.nanolett.0c01146]
File allegati a questo prodotto
File Dimensione Formato  
Nery_Long-Range Rhombohedral-Stacked_2020.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 7.44 MB
Formato Adobe PDF
7.44 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1541933
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 8
social impact