692 citations · 1.7k across the 11 of their papers we have counts for
11 papers
Excitons in van der Waals materials: from monolayer to bulk hexagonal boron nitride
Jaakko Koskelo, Giorgia Fugallo, Mikko Hakala +3
We present a general picture of the exciton properties of layered materials in terms of the excitations of their single-layer building blocks. To this end, we derive a model excito…
Electron-energy-loss and time-dependent density functional theory study on the plasmon dispersion in 2H-NbS2
Pierluigi Cudazzo, Eric Müller, Carsten Habenicht +5
We examine the experimental and theoretical electron-energy loss spectra in 2-CuNbS and find that the 1 eV plasmon in this material does not exhibit the regular posi…
Exciton band structure in two-dimensional materials
Pierluigi Cudazzo, Lorenzo Sponza, Christine Giorgetti +3
Low-dimensional materials differ from their bulk counterpart in many respects. In particular, the screening of the Coulomb interaction is strongly reduced, which can have important…
Instantaneous band gap collapse in photoexcited monoclinic VO due to photocarrier doping
Daniel Wegkamp, Marc Herzog, Lede Xian +8
Using femtosecond time-resolved photoelectron spectroscopy we demonstrate that photoexcitation transforms monoclinic VO quasi-instantaneously into a metal. Thereby, we exclude…
Local-field effects on the plasmon dispersion of two-dimensional transition metal dichalcogenides
Pierluigi Cudazzo, Matteo Gatti, Angel Rubio
Two-dimensional transition-metal dichalcogenides (TMDs) are gaining increasing attention as alternative to graphene for their very high potential in optoelectronics applications. H…
Phonon Softening and Direct to Indirect Bandgap Crossover in Strained Single Layer MoSe2
S. Horzum, H. Sahin, S. Cahangirov +4
Motivated by recent experimental observations of Tongay et al. [Tongay et al., Nano Letters, 12(11), 5576 (2012)] we show how the electronic properties and Raman characteristics of…