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LaOFeSe, a Mott insulator on the brink of orbital-selective metalization
Gianluca Giovannetti, Luca de' Medici, Markus Aichhorn +1
LaOFeSe can be explained in terms of Mott localization in sharp contrast with the metallic behavior of FeSe and other parent parent compounds of iron superconductor…
Kekule' textures, pseudo-spin one Dirac cones and quadratic band crossings in a graphene-hexagonal indium chalcogenide bilayer
Gianluca Giovannetti, Massimo Capone, Jeroen van den Brink +1
Using density-functional theory, we calculate the electronic bandstructure of single-layer graphene on top of hexagonal In_2Te_2 monolayers. The geometric configuration with In and…
Localised vibrations in superconducting YBCO revealed by ultra-fast optical coherent spectroscopy
Fabio Novelli, Gianluca Giovannetti, Adolfo Avella +6
The interaction between phonons and high-energy excitations of electronic origin in cuprates and their role in the superconducting mechanisms is still controversial. Here we use co…
Downfolding electron-phonon Hamiltonians from ab-initio calculations: application to KPicene
Gianluca Giovannetti, Michele Casula, Philipp Werner +2
We propose an electron-phonon parameterization which reliably reproduces the geometry and harmonic frequencies of a real system. With respect to standard electron-phonon models, it…
Correlation-driven electronic multiferroicity in (TMTTF)- organic crystals
G. Giovannetti, R. Nourafkan, G. Kotliar +1
Using a combination of density functional theory and dynamical mean field theory we show that electric polarization and magnetism are strongly intertwined in (TMTTF)- (XP…
Dual nature of the ferroelectric and metallic state in LiOsO
Gianluca Giovannetti, Massimo Capone
Using density functional theory we investigate the lattice instability and electronic structure of recently discovered ferroelectric metal LiOsO. We show that the ferroelectric…