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 …

Strontium-Doped Perovskites Rival Platinum Catalysts for Treating NOx in Simulated Diesel Exhaust

CH Kim, G Qi, K Dahlberg, W Li - Science, 2010 - science.org
The high cost and poor thermal durability of current lean nitrogen oxides (NO x)
aftertreatment catalysts are two of the major barriers to widespread adoption of highly fuel …

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 …

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 …

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 …

Highly nonperturbative nature of the Mott metal-insulator transition: Two-particle vertex divergences in the coexistence region

M Pelz, S Adler, M Reitner, A Toschi - Physical Review B, 2023 - APS
We thoroughly analyze the divergences of the irreducible vertex functions occurring in the
charge channel of the half-filled Hubbard model in close proximity to the Mott metal-insulator …

Quantum geometric contributions to the BKT transition: Beyond mean field theory

Z Wang, G Chaudhary, Q Chen, K Levin - Physical Review B, 2020 - APS
We study quantum geometric contributions to the Berezinskii-Kosterlitz-Thouless (BKT)
transition temperature T BKT in the presence of fluctuations beyond BCS theory. Because …

Dissipative dynamics of a fermionic superfluid with two-body losses

G Mazza, M Schirò - Physical Review A, 2023 - APS
We study the dissipative dynamics of a fermionic superfluid in the presence of two-body
losses. We use a variational approach for the Lindblad dynamics and obtain dynamical …

Coexistence of -wave superconductivity and phase separation in the half-filled extended Hubbard model with attractive interactions

E Linnér, C Dutreix, S Biermann, EA Stepanov - Physical Review B, 2023 - APS
Understanding competing instabilities in systems with correlated fermions remains one of
the holy grails of modern condensed matter physics. Among the fermionic lattice models …

Anomalous expansion of attractively interacting fermionic atoms in an optical lattice

L Hackermüller, U Schneider, M Moreno-Cardoner… - Science, 2010 - science.org
The interplay of thermodynamics and quantum correlations can give rise to counterintuitive
phenomena in many-body systems. We report on an isentropic effect in a spin mixture of …