Exploring interlayer Dirac cone coupling in commensurately rotated few-layer graphene on SiC(000-1)

Autor:	Mathieu, C., Conrad, E. H., Wang, F., Rault, J. E., Feyer, V., Schneider, C. M., Renault, O., Barrett, N.
Rok vydání:	2018
Předmět:	Condensed Matter - Materials Science
Zdroj:	Surface and Interface Analysis 46, 1268 (2014)
Druh dokumentu:	Working Paper
DOI:	10.1002/sia.5541
Popis:	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 k-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{\deg} and 27{\deg} 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, due to a Brillouin zone folding. Comment: 11 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1806.06559 Zobrazit plný text záznamu View this record from Arxiv