53 citations · 158 across the 6 of their papers we have counts for
8 papers · 1 filter
Pairing boost from enhanced spin-fermion coupling in the pseudogap regime
Yang Yu, Sergei Iskakov, Emanuel Gull +2
We perform a fluctuation analysis of the pairing interaction in the hole-doped Hubbard model within the dynamical cluster approximation. Our analysis reveals that spin-fluctuation-…
Dynamical Cluster Approximation Study of Electron Localization in the Extended Hubbard Model
Hanna Terletska, Sergei Iskakov, Thomas Maier +1
We perform a detailed study of the phase transitions and mechanisms of electron localization in the extended Hubbard model using the dynamical cluster approximation on a $2\times 2…
Testing the GFCCSD impurity solver on real materials within the self-energy embedding theory framework
Chia-Nan Yeh, Avijit Shee, Sergei Iskakov +1
We apply the Green's function coupled cluster singles and doubles (GFCCSD) impurity solver to realistic impurity problems arising for strongly correlated solids within the self-ene…
Ab-Initio self-energy embedding for the photoemission spectra of NiO and MnO
Sergei Iskakov, Chia-Nan Yeh, Emanuel Gull +1
The accurate ab-initio simulation of periodic solids with strong correlations is one of the grand challenges of condensed matter. While mature methods exist for weakly correlated s…
Charge order and antiferromagnetism in the extended Hubbard model
Joseph Paki, Hanna Terletska, Sergei Iskakov +1
We study the extended Hubbard model on a two-dimensional half-filled square lattice using the dynamical cluster approximation. We present results on the phase boundaries between th…
Role of three-particle vertex within dual fermion calculations
T. Ribic, P. Gunacker, S. Iskakov +5
We investigate the influence of self-energy diagrams beyond the two-particle vertex level within dual fermion theory. Specifically, we calculate the local three-particle vertex and…