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5 papers · 1 filter
Dual-Fermion approach to Non-equilibrium strongly correlated problems
C. Jung, A. Lieder, S. Brener +6
We present a generalization of the recently developed dual fermion approach introduced for correlated lattices to non-equilibrium problems. In its local limit, the approach has bee…
Momentum-dependent snapshots of a melting charge density wave
Jesse C. Petersen, Stefan Kaiser, Nicky Dean +11
Charge density waves (CDWs) underpin the electronic properties of many complex materials. Near-equilibrium CDW order is linearly coupled to a periodic, atomic-structural distortion…
Polaronic conductivity in the photoinduced phase of 1T-TaS2
Nicky Dean, Jesse Petersen, Daniele Fausti +5
The transient optical conductivity of photoexcited 1T-TaS2 is determined over a three-order-of-magnitude frequency range. Prompt collapse and recovery of the Mott gap is observed.…
Dynamics of photo-activated Coulomb complexes
Christian Gnodtke, Ulf Saalmann, Jan-Michael Rost
Intense light with frequencies above typical atomic or molecular ionization potentials as provided by free-electron lasers couples many photons into extended targets such as cluste…
Semiconductor saturable absorbers for ultrafast THz signals
Matthias C. Hoffmann, Dmitry Turchinovich
We demonstrate saturable absorber behavior of n-type semiconductors GaAs, GaP and Ge in THz frequency range at room temperature using nonlinear THz spectroscopy. The saturation mec…