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Event 

Title:
Pedro Venezuela: Espectro Raman em grafeno
When:
31.03.2011 14.30 h
Where:
Matéria Condensada Teórica - Niterói
Categoría:
Seminários

Description

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


Venue

Grupo:
Matéria Condensada Teórica
Street:
IF-UFF
ZIP:
24210-346
City:
Niterói
State:
RJ
Country:
Country: br

Description

Sorry, no description available
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