Universality of moiré physics in collapsed chiral carbon nanotubes. (5th March 2023)

• Record Type: Journal Article
• Authors: Arroyo-Gascón, Olga; Fernández-Perea, Ricardo; Morell, Eric Suárez; Cabrillo, Carlos; Chico, Leonor
• Is Part Of: Carbon. Volume 205(2023)
• Page Start: 394
• Page End: 401
• Publication Date: 2023-03-05
• Subjects: Carbon nanotubes -- Moiré -- Magic angles -- Twisted bilayer graphene; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2023.01.052
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: We report the existence of moiré patterns and magic angle physics in all families of chiral collapsed carbon nanotubes. A detailed study of the electronic structure of all types of chiral nanotubes, previously collapsed via molecular dynamics, has been performed. We find that each family possesses a unique geometry and moiré disposition, as well as a characteristic number of flat bands. Remarkably, all kinds of nanotubes behave the same with respect to magic angle tuning, showing a monotonic behavior that gives rise to magic angles in full agreement with those of twisted bilayer graphene. Therefore, magic angle behavior is universally found in chiral collapsed nanotubes with a small chiral angle, giving rise to moiré patterns. Our approach comprises first-principles and semi-empirical calculations of the band structure, density of states and spatial distribution of the localized states signaled by flat bands. Graphical abstract: