263 citations · 1.3k across the 37 of their papers we have counts for
15 papers · 1 filter
Short-range excitonic phenomena in low-density metals
Jaakko Koskelo, Lucia Reining, Matteo Gatti
Excitonic effects in metals are commonly supposed to be weak, because the Coulomb interaction is strongly screened. We investigate the low-density regime of the homogeneous electro…
Dynamical screening in SrVO: Inelastic x-ray scattering experiments and ab initio calculations
Kari Ruotsalainen, Alessandro Nicolaou, Christoph J. Sahle +5
We characterize experimentally and theoretically the high-energy dielectric screening properties of the prototypical correlated metal SrVO. The dynamical structure factor measu…
Subpicosecond metamagnetic phase transition driven by non-equilibrium electron dynamics
Federico Pressacco, Davide Sangalli, Vojtěch Uhlíř +13
Femtosecond light-induced phase transitions between different macroscopic orders provide the possibility to tune the functional properties of condensed matter on ultrafast timescal…
Resonant inelastic x-ray scattering study of doping and temperature dependence of low-energy excitations in LaSrVO
Kari Ruotsalainen, Matteo Gatti, James M. Ablett +5
We present a temperature and doping dependent resonant inelastic X-ray scattering experiment at the V L and O K edges in LaSrVO for and . This…
Dispersing and non-dispersing satellites in the photoemission spectra of aluminum
Jianqiang Sky Zhou, Lucia Reining, Alessandro Nicolaou +9
Satellites in electronic spectra are pure many-body effects, and their study has been of increasing interest in both experiment and theory. The presence of satellites due to plasmo…
Spectroscopy of the Hubbard dimer: the spectral potential
Marco Vanzini, Lucia Reining, Matteo Gatti
The spectral potential is the dynamical generalization of the Kohn-Sham potential. It targets, in principle exactly, the spectral function in addition to the electronic density. He…
Laser induced phase transition in epitaxial FeRh layers studied by pump-probe valence band photoemission
Federico Pressacco, Vojtěch Uhlíř, Matteo Gatti +7
We use time-resolved X-ray photoelectron spectroscopy to probe the electronic and magnetization dynamics in FeRh films after ultrafast laser excitations. We present experimental an…
Revisiting the origin of satellites in core level photoemission of transparent conducting oxides: the case of -doped SnO
F. Borgatti, J. A. Berger, D. Céolin +14
The longstanding problem of interpretation of satellite structures in core level photoemission spectra of metallic systems with a low density of conduction electrons is addressed u…
Cumulant Green's function calculations of plasmon satellites in bulk sodium: influence of screening and the crystal environment
Jianqiang Sky Zhou, Matteo Gatti, J. J. Kas +2
We present ab initio calculations of the photoemission spectra of bulk sodium using different flavors of the cumulant expansion approximation for the Green's function. In particula…
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…
Symmetry of the Fermi surface and evolution of the electronic structure across the paramagnetic-helimagnetic transition in MnSi/Si(111)
Alessandro Nicolaou, Matteo Gatti, Elena Magnano +11
MnSi has been extensively studied for five decades, nonetheless detailed information on the Fermi surface (FS) symmetry is still lacking. This missed information prevented from a c…
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…
The valence electron photoemission spectrum of semiconductors: ab initio description of multiple satellites
Matteo Guzzo, Giovanna Lani, Francesco Sottile +7
The experimental valence band photoemission spectrum of semiconductors exhibits multiple satellites that cannot be described by the GW approximation for the self-energy in the fram…
Design of effective kernels for spectroscopy and molecular transport: time-dependent current-density-functional theory
Matteo Gatti
Time-dependent current-density-functional theory (TDCDFT) provides an in principle exact scheme to calculate efficiently response functions for a very broad range of applications.…
Valence band electronic structure of V2O3: identification of V and O bands
E. Papalazarou, Matteo Gatti, M. Marsi +14
We present a comprehensive study of the photon energy dependence of the valence band photoemission yield in the prototype Mott-Hubbard oxide V2O3. The analysis of our experimental…