[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.
Disciplines :
Physique
Auteur, co-auteur :
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
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Ab initio calculation of the G peak intensity of graphene: Laser-energy and Fermi-energy dependence and importance of quantum interference effects
Date de publication/diffusion :
22 mai 2017
Titre du périodique :
Physical Review. B
ISSN :
2469-9950
eISSN :
2469-9969
Maison d'édition :
American Physical Society
Volume/Tome :
95
Fascicule/Saison :
19
Pagination :
195422
Peer reviewed :
Peer reviewed vérifié par ORBi
Focus Area :
Physics and Materials Science
Projet FnR :
FNR10196198 - Calculation Of Raman Spectra Of Graphene In Various Conditions With A Semi-empirical Approach, 2015 (15/02/2015-31/03/2018) - Sven Reichardt
