Reference : Doped Graphene as Tunable Electron-Phonon Coupling Material

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/8186

Title :	Doped Graphene as Tunable Electron-Phonon Coupling Material
Language :	English
Author, co-author :	Attaccalite, Claudio [Institut NEEL, CNRS-UJF, Grenoble, France / Nano-Bio Spectroscopy group and ETSF Scientific Development Centre, Dpto. Fisica de Materiales, Universidad del Pais Vasco, San Sebastian, Spain]
	Wirtz, Ludger [Centre National de la Recherche Scientifique - CNRS > UMR 8520, Dept. ISEN > Istitute for Electronics, Microelectronics and Nanotechnology]
	Lazzeri, Michele [Universités Paris 6 et 7 > IMPMC]
	Mauri, Francesco [Universités Paris 6 et 7 > IMPMC]
	Rubio, Angel [Nano-Bio Spectroscopy group and ETSF Scientific Development Centre, Universidad del Pais Vasco, San Sebastian, Spain / Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany]
Publication date :	2010
Journal title :	Nano Letters
Publisher :	American Chemical Society
Volume :	10
Issue/season :	4
Pages :	1172-1176
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	1530-6984
e-ISSN :	1530-6992
City :	Washington
Country :	DC
Keywords :	[en] Graphene ; electron-phonon coupling ; Raman spectroscopy
Abstract :	[en] we present a new way to tune the electron phonon coupling (EPC) in graphene by changing the deformation potential with electron/hole doping. We show the EPC for highest optical branch at the high symmetry point K acquires a strong dependency on the doping level due to electron electron correlation not accounted in mean-field approaches. Such a dependency influences the dispersion (with respect to the laser energy) of the Raman D and 2D lines and the splitting of the 2D peak in multilayer graphene. Finally this doping dependence opens the possibility to construct tunable electronic devices through external control of the EPC.
Permalink :	http://hdl.handle.net/10993/8186
	also: http://hdl.handle.net/10993/8268
DOI :	10.1021/nl9034626

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