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Evento 

Título:
Pedro Venezuela: Espectro Raman em grafeno
quando:
31.03.2011 14.30 h
onde:
Matéria Condensada Teórica - Niterói
Categoria:
Seminários

Descrição

Theory of double-resonant Raman spectra in graphene:

intensity and line shape of defect-induced and two-phonon bands


Pedro Venezuela (UFF)

We calculate the double resonant Raman spectrum of graphene, and determine the lines associated to both phonon-defect processes (such as in the D line), and two-phonons ones (such as in the 2D line). Phonon and electronic dispersions reproduce calculations based on density functional theory corrected with GW. Electron-light, -phonon , and -defect scattering matrix elements and the electronic linewidth are explicitly calculated. Defect-induced processes are
simulated by considering different kind of idealized defects. We compare our calculations with experiments and are able to identify the detailed mechanisms in each case.

Local: Antiga biblioteca


Grupo

Grupo:
Matéria Condensada Teórica
Rua:
IF-UFF
CEP:
24210-346
Cidade:
Niterói
UF:
RJ
País:
País: br

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