310 citations · 713 across the 6 of their papers we have counts for
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Impact of the electron-electron correlation on phonon dispersions: failure of LDA and GGA functionals in graphene and graphite
Michele Lazzeri, Claudio Attaccalite, Ludger Wirtz +1
We compute electron-phonon coupling (EPC) of selected phonon modes in graphene and graphite using various ab-initio methods. The inclusion of non-local exchange-correlation effects…
Raman imaging of doping domains in graphene on SiO2
C. Stampfer, L. Wirtz, A. Jungen +4
We present spatially resolved Raman images of the G and 2D lines of single-layer graphene flakes. The spatial fluctuations of G and 2D lines are correlated and are thus shown to be…
Excitonic effects in optical absorption and electron-energy loss spectra of hexagonal boron nitride
Ludger Wirtz, Andrea Marini, Myrta Gruning +1
A new interpretation of the optical and energy-loss spectra of hexagonal boron nitride is provided based on first-principle calculations. We show that both spectra cannot be explai…