Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach

C Giannetti, M Capone, D Fausti, M Fabrizio… - Advances in …, 2016 - Taylor & Francis
In the last two decades non-equilibrium spectroscopies have evolved from avant-garde
studies to crucial tools for expanding our understanding of the physics of strongly correlated …

Colloquium: Modeling the unconventional superconducting properties of expanded fullerides

M Capone, M Fabrizio, C Castellani, E Tosatti - Reviews of Modern Physics, 2009 - APS
The trivalent alkali fulleride solids of generic composition A 3 C 60, where C 60 is the
fullerene molecule and A= K, Rb, and Cs, are a well-established family of molecular …

Local electronic correlation at the two-particle level

G Rohringer, A Valli, A Toschi - Physical Review B—Condensed Matter and …, 2012 - APS
Electronic-correlated systems are often well described by dynamical mean field theory
(DMFT). While DMFT studies have mainly focused hitherto on one-particle properties …

Fate of the false Mott-Hubbard transition in two dimensions

T Schäfer, F Geles, D Rost, G Rohringer, E Arrigoni… - Physical Review B, 2015 - APS
We have studied the impact of nonlocal electronic correlations at all length scales on the
Mott-Hubbard metal-insulator transition in the unfrustrated two-dimensional Hubbard model …

Mechanism for fluctuating pair density wave

C Setty, L Fanfarillo, PJ Hirschfeld - Nature Communications, 2023 - nature.com
In weakly coupled BCS superconductors, only electrons within a tiny energy window around
the Fermi energy, EF, form Cooper pairs. This may not be the case in strong coupling …

Fluctuation diagnostics of the electron self-energy: Origin of the pseudogap physics

O Gunnarsson, T Schäfer, JPF LeBlanc, E Gull… - Physical review …, 2015 - APS
We demonstrate how to identify which physical processes dominate the low-energy spectral
functions of correlated electron systems. We obtain an unambiguous classification through …

Divergent precursors of the Mott-Hubbard transition at the two-particle level

T Schäfer, G Rohringer, O Gunnarsson, S Ciuchi… - Physical Review Letters, 2013 - APS
Identifying the fingerprints of the Mott-Hubbard metal-insulator transition may be quite
elusive in correlated metallic systems if the analysis is limited to the single particle level …

Two-dimensional attractive Hubbard model and the BCS-BEC crossover

RA Fontenele, NC Costa, RR dos Santos, T Paiva - Physical Review B, 2022 - APS
Recent experiments with ultracold fermionic atoms in optical lattices have provided a
tuneable and clean realization of the attractive Hubbard model (AHM). In view of this …

Impact of nonlocal correlations over different energy scales: A dynamical vertex approximation study

G Rohringer, A Toschi - Physical Review B, 2016 - APS
In this paper, we investigate how nonlocal correlations affect, selectively, the physics of
correlated electrons over different energy scales, from the Fermi level to the band edges …

Antiferromagnetic and -wave pairing correlations in the strongly interacting two-dimensional Hubbard model from the functional renormalization group

D Vilardi, C Taranto, W Metzner - Physical Review B, 2019 - APS
Using the dynamical mean-field theory (DMFT) as a “booster rocket”, the functional
renormalization group (fRG) can be upgraded from a weak-coupling method to a powerful …