[en] The phonon dispersion of singly oriented graphene on Ir(111) has been determined by angle-resolved inelastic electron scattering. Replica of graphene phonon bands are induced by the moire superstructure. Calculations for a linear chain of C atoms attached to an infinitely heavy substrate reveal that imposing a superstructure by periodically varying the C-C interaction and the C-substrate coupling induces replicated phonons at wave vectors reflecting the supercell periodicity. Deviations between the phonon dispersion of graphene on Ir(111) and of pristine graphene are analyzed and rationalized in terms of the weak graphene-Ir(111) interaction.
Centre de recherche :
ULHPC - University of Luxembourg: High Performance Computing
Disciplines :
Physique
Auteur, co-auteur :
Endlich, Michael; Technische Universität Ilmenau > Institut für Physik
PEREIRA COUTADA MIRANDA, Henrique ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
MOLINA-SANCHEZ, Alejandro ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
WIRTZ, Ludger ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Kröger, Jörg; Technische Universität Ilmenau > Institut für Physik
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Moiré-induced replica of graphene phonons on Ir(111)
Date de publication/diffusion :
octobre 2014
Titre du périodique :
Annalen der Physik
ISSN :
0003-3804
eISSN :
1521-3889
Maison d'édition :
Wiley, Weinheim, Allemagne
Volume/Tome :
526
Fascicule/Saison :
9-10
Pagination :
372-380
Peer reviewed :
Peer reviewed vérifié par ORBi
Projet FnR :
FNR6010221 - Optical And Transport Properties Of Mos2 In The Presence Of Defects, 2013 (01/10/2013-30/09/2017) - Henrique Miranda
