Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

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
  • seminMAURI2011b.pdf (127872 bytes) OPEN

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