Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
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 …
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
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 …
aftertreatment catalysts are two of the major barriers to widespread adoption of highly fuel …
Local electronic correlation at the two-particle level
Electronic-correlated systems are often well described by dynamical mean field theory
(DMFT). While DMFT studies have mainly focused hitherto on one-particle properties …
(DMFT). While DMFT studies have mainly focused hitherto on one-particle properties …
Fluctuation diagnostics of the electron self-energy: Origin of the pseudogap physics
We demonstrate how to identify which physical processes dominate the low-energy spectral
functions of correlated electron systems. We obtain an unambiguous classification through …
functions of correlated electron systems. We obtain an unambiguous classification through …
Two-dimensional attractive Hubbard model and the BCS-BEC crossover
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 …
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 …
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 …
transition temperature T BKT in the presence of fluctuations beyond BCS theory. Because …
Dissipative dynamics of a fermionic superfluid with two-body losses
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 …
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
Understanding competing instabilities in systems with correlated fermions remains one of
the holy grails of modern condensed matter physics. Among the fermionic lattice models …
the holy grails of modern condensed matter physics. Among the fermionic lattice models …
Anomalous expansion of attractively interacting fermionic atoms in an optical lattice
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 …
phenomena in many-body systems. We report on an isentropic effect in a spin mixture of …