Exploring interlayer Dirac cone coupling in commensurately rotated few‐layer graphene on SiC(000‐1). (2nd June 2014)

• Record Type: Journal Article
• Authors: Mathieu, Claire; Conrad, Edward H.; Wang, Feng; Rault, Julien E.; Feyer, Vitaliy; Schneider, Claus M.; Renault, Olivier; Barrett, Nick; Yurimoto, Hisayoshi
• Is Part Of: Surface and interface analysis. Volume 46:Number 12/13(2014)
• Page Start: 1268
• Page End: 1272
• Publication Date: 2014-06-02
• Subjects: Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.5541
• Languages: English
• ISSNs: 0142-2421

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>We investigate electronic band‐structure images in reciprocal space of few‐layer graphene epitaxially grown on SiC(000‐1). In addition to the observation of commensurate rotation angles of the graphene layers, the <italic>k</italic>‐space images recorded near the Fermi edge highlight structures originating from diffraction of the Dirac cones due to the relative rotation of adjacent layers. The 21.9° and 27° rotation angles between two sheets of graphene are responsible for a periodic pattern that can be described with a superlattice unit cells. The superlattice generates replicas of Dirac cones with smaller wave vectors, because of a Brillouin zone folding. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract>