Screening of electron-phonon coupling in graphene on Ir(111)

Reference : Screening of electron-phonon coupling in graphene on Ir(111)


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/10565

Title :	Screening of electron-phonon coupling in graphene on Ir(111)
Language :	English
Author, co-author :	Endlich, M. [Technische Universität Illmenau, Germany]
	Molina-Sanchez, Alejandro [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Wirtz, Ludger [urg, Physics and Material Sciences Research Unit / CNRS UMR 8520, IEMN, France]
	Kröger, J. []
Publication date :	4-Nov-2013
Journal title :	Physical Review. B, Condensed Matter and Materials Physics
Publisher :	American Physical Society
Volume :	88
Issue/season :	205403
Peer reviewed :	Yes (verified by ORBi^lu)
Audience :	International
ISSN :	1098-0121
e-ISSN :	1550-235X
City :	Woodbury
Country :	NY
Abstract :	[en] The phonon dispersion of graphene on Ir(111) has been determined by means of angle-resolved inelastic electron scattering and density functional calculations. Kohn anomalies of the highest optical-phonon branches are observed at the ¯ and ¯K point of the surface Brillouin zone. At ¯K the Kohn anomaly is weaker than observed for pristine graphene and graphite. This observation is rationalized in terms of a decrease of the electron-phonon coupling due to screening of graphene electron correlations by the metal substrate.
Permalink :	http://hdl.handle.net/10993/10565
DOI :	10.1103/PhysRevB.88.205403

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