Reference : Ab initio calculation of the G peak intensity of graphene: Laser-energy and Fermi-ene...

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/31247

Title :	Ab initio calculation of the G peak intensity of graphene: Laser-energy and Fermi-energy dependence and importance of quantum interference effects
Language :	English
Author, co-author :	Reichardt, Sven [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 >]
Publication date :	22-May-2017
Journal title :	Physical Review. B
Publisher :	American Physical Society
Volume :	95
Issue/season :	19
Pages :	195422
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	2469-9950
e-ISSN :	2469-9969
Keywords :	[en] graphene ; Raman spectroscopy ; electron-phonon coupling ; ab-initio calculations
Abstract :	[en] We present the results of a diagrammatic, fully ab initio calculation of the G peak intensity of graphene. The flexibility and generality of our approach enables us to go beyond the previous analytical calculations in the low-energy regime. We study the laser and Fermi energy dependence of the G peak intensity and analyze the contributions from resonant and nonresonant electronic transitions. In particular, we explicitly demonstrate the importance of quantum interference and nonresonant states for the G peak process. Our method of analysis and computational concept is completely general and can easily be applied to study other materials as well.
Permalink :	http://hdl.handle.net/10993/31247
DOI :	10.1103/PhysRevB.95.195422
FnR project :	FnR ; FNR10196198 > Sven Reichardt > RAMGRASEA > Calculation Of Raman Spectra Of Graphene In Various Conditions With A Semi-Empirical Approach > 01/03/2015 > 14/02/2018 > 2015; FNR7490149 > Ludger Wirtz > NANOTMD > 20 Electric Transport And Superconductivity In TransitionMetal Dichalcogenides Nanolayers > 01/02/2014 > 31/01/2019 > 2013

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