Publications (44)
Strategies to build functionals of the density, or functionals of Green's functions: what can we learn?
Ayoub Aouina, Matteo Gatti, Lucia Reining
The many-body problem can in general not be solved exactly, and one of the most prominent approximations is to build perturbation expansions. A huge variety of expansions is possib…
Connections between resonant inelastic x-ray scattering and complementary x-ray spectroscopies: probing excitons at Al K and L edges of -AlO
M. Laura Urquiza, Matteo Gatti, Francesco Sottile
We present an ab initio study of neutral core and valence electronic excitations in α-Al2O3 by solving the Bethe-Salpeter equation (BSE) of many-body perturbation theory within an…
Exciton energy-momentum map of hexagonal boron nitride
Giorgia Fugallo, Matteo Aramini, Jaakko Koskelo +6
Understanding and controlling the way excitons propagate in solids is a key for tailoring materials with improved optoelectronic properties. A fundamental step in this direction is…
Stable room-temperature ferromagnetic phase at the FeRh(100) surface
Federico Pressacco, VojtÄch UhlÃÅ, Matteo Gatti +3
Interfaces and low dimensionality are sources of strong modifications of electronic, structural, and magnetic properties of materials. FeRh alloys are an excellent example because…
Delocalization of dark and bright excitons in flat-band materials and the optical properties of VO
Vitaly Gorelov, Lucia Reining, Martin Feneberg +4
The simplest picture of excitons in materials with atomic-like localization of electrons is that of Frenkel excitons, where electrons and holes stay close together, which is associ…
Subpicosecond metamagnetic phase transition driven by non-equilibrium electron dynamics
Federico Pressacco, Davide Sangalli, VojtÄch UhlÃÅ +13
Femtosecond light-induced phase transitions between different macroscopic orders provide the possibility to tune the functional properties of condensed matter on ultrafast timescal…