Statut | Confirmé |
Série | SEM-BESSON |
Domaines | cond-mat |
Date | Jeudi 31 Mars 2011 |
Heure | 10:30 |
Institut | IMPMC |
Salle | Salle de Conférence, 4ème étage, Tour 22-23, Salle 1 |
Nom de l'orateur | Mauri |
Prenom de l'orateur | Francesco |
Addresse email de l'orateur | |
Institution de l'orateur | IMPMC |
Titre | Everything you always wanted to know about raman spectra of graphene (but were afraid to ask). |
Résumé | I will present an approach [1] that allows the ab-initio calculation of shape, intensity and position of defect-activated (D, D', D'') and 2-phonon (D+D'', 2D, 2D') resonant Raman peaks in graphene. We also reproduce the weaker 2-phonon bands, that involve acustic branches and that have recently been measured in graphene. Our (parameter-free) simulated spectra closely reproduce the measured spectra and their evolution with the laser energy and defect concentration. The detailed description of the Raman process allows us to identify the most relevant phonons, scattering events, and defect types involved in each peak. [1] P. Venezuela, M. Lazzeri, F. Mauri, to be published. |
Numéro de preprint arXiv | |
Commentaires | |
Fichiers attachés |
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