1.3k citations · 25.3k across the 269 of their papers we have counts for
6 papers · 2 filters
Anisotropic excitonic effects in the energy loss function of hexagonal boron nitride
S. Galambosi, L. Wirtz, J. A. Soininen +7
We demonstrate that the valence energy-loss function of hexagonal boron nitride (hBN) displays a strong anisotropy in shape, excitation energy and dispersion for momentum transfer…
Self-Energy and Excitonic Effects in the Electronic and Optical Properties of TiO2 Crystalline Phases
Letizia Chiodo, Juan Maria Garcia-Lastra, Amilcare Iacomino +4
We present a unified ab-initio study of electronic and optical properties of TiO2 rutile and anatase phases, with a combination of Density Functional Theory and Many Body Perturbat…
Doped graphene as tunable electron-phonon coupling material
Claudio Attaccalite, Ludger Wirtz, Michele Lazzeri +2
We present a new way to tune the electron-phonon coupling (EPC) in graphene by changing the deformation potential with electron/hole doping. We show the EPC for highest optical bra…
Many body effects in the excitation spectrum of a defect in SiC
Michel Bockstedte, Andrea Marini, Oleg Pankratov +1
We show that electron correlations control the photophysics of defects in SiC through both renormalization of the quasiparticle bandstructure and exciton effects. We consider the c…
Strong charge-transfer excitonic effects and Bose-Einstein exciton-condensate in graphane
Pierluigi Cudazzo, Claudio Attacalite, Ilya V. Tokatly +1
Using first principles many-body theory methods (GW+BSE) we demonstrate that optical properties of graphane are dominated by localized charge-transfer excitations governed by enhan…
Sodium: a charge-transfer insulator at high pressures
Matteo Gatti, Ilya V. Tokatly, Angel Rubio
By means of first-principles methods we analyze the optical response of transparent dense sodium as a function of applied pressure. We discover an unusual kind of charge-transfer e…