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8 papers
Accurate modeling of FeSe with screened Fock exchange and Hund's metal correlations
Tommaso Gorni, Pablo Villar Arribi, Michele Casula +1
We reproduce the electronic properties of FeSe in the high-temperature phase within an ab initio framework that includes screened Fock exchange and local dynamical correlations. We…
Nature of the Doping-Driven Metal-Insulator Transition in Correlated Electron Systems with strong Hund's Exchange Coupling
Jakob Steinbauer, Luca de' Medici, Silke Biermann
We study the doping-driven Mott metal-insulator transition for multi-orbital Hubbard models with Hund's exchange coupling at finite temperatures. As in the single-orbital Hubbard m…
Charge disproportionation, mixed valence, and Janus effect in multiorbital systems: A tale of two insulators
Aldo Isidori, Maja Berovic, Laura Fanfarillo +3
Multiorbital Hubbard models host strongly correlated 'Hund's metals' even for interactions much stronger than the bandwidth. We characterize this interaction-resilient metal as a m…
Hund-enhanced electronic compressibility in FeSe and its correlation with T
Pablo Villar Arribi, Luca de' Medici
We compute the compressibility of the conduction electrons in both bulk orthorhombic FeSe and monolayer FeSe on SrTiO substrate, including dynamical electronic correlations wit…
Hund's induced Fermi-liquid instabilities and enhanced quasiparticle interactions
Luca de' Medici
Hund's coupling is shown to generally favor, in a doped half-filled Mott insulator, an increase in the compressibility culminating in a Fermi-liquid instability towards phase separ…
Selective Mottness as a key to iron superconductors
Luca de' Medici, Gianluca Giovannetti, Massimo Capone
The phase diagram of the high-Tc cuprates is dominated by the Mott insulating phase of the parent compounds. As we approach it from large doping, a standard Fermi-liquid gradually…
Orbital-Selective Mott transition out of band degeneracy lifting
Luca de' Medici, S. R. Hassan, Massimo Capone +1
We outline a general mechanism for Orbital-selective Mott transition (OSMT), the coexistence of both itinerant and localized conduction electrons, and show how it can take place in…
A continuous-time solver for quantum impurity models
Philipp Werner, Armin Comanac, Luca De Medici +2
We present a new continuous time solver for quantum impurity models such as those relevant to dynamical mean field theory. It is based on a stochastic sampling of a perturbation ex…