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Superconductivity in the two-band Hubbard model
Akihisa Koga, Philipp Werner
We study the two-band Hubbard model in infinite dimensions by solving the dynamical mean-field equations with a strong coupling continuous-time quantum Monte Carlo method and show…
Dynamical screening in La2CuO4
Philipp Werner, Rei Sakuma, Fredrik Nilsson +1
We show that the dynamical screening of the Coulomb interaction among Cu-d electrons in high-Tc cuprates is very strong and that a proper treatment of this effect is essential for…
Ultra-fast photo-carrier relaxation in Mott insulators with short-range spin correlations
Martin Eckstein, Philipp Werner
We compute the time-resolved photoemission spectrum after photo-doping in a two-dimensional Mott-Hubbard insulator. We find that the relaxation rate of high-energy photo-doped elec…
Accuracy of downfolding based on the constrained random phase approximation
Hiroshi Shinaoka, Matthias Troyer, Philipp Werner
We study the reliability of the constrained random phase approximation (cRPA) method for the calculation of low-energy effective Hamiltonians by considering multi-orbital lattice m…
QIST: An open source continuous-time quantum Monte Carlo impurity solver toolkit
Li Huang, Yilin Wang, Zi Yang Meng +3
Quantum impurity solvers have a broad range of applications in theoretical studies of strongly correlated electron systems. Especially, they play a key role in dynamical mean-field…
Role of impact ionization in the thermalization of photo-excited Mott insulators
Philipp Werner, Karsten Held, Martin Eckstein
We study the influence of the pulse energy and fluence on the thermalization of photo-doped Mott insulators. If the Mott gap is smaller than the width of the Hubbard bands, the kin…