7 papers
Comparing the effective enhancement of local and non-local spin-orbit couplings on honeycomb lattices due to strong electronic correlations
Markus Richter, Johannes Graspeuntner, Thomas Schäfer +2
We investigate the interplay of electronic correlations and spin-orbit coupling (SOC) for a one-band and a two-band honeycomb lattice model. The main difference between the two mod…
Tracking the Footprints of Spin Fluctuations: A MultiMethod, MultiMessenger Study of the Two-Dimensional Hubbard Model
Thomas Schäfer, Nils Wentzell, Fedor Šimkovic +23
The Hubbard model represents the fundamental model for interacting quantum systems and electronic correlations. Using the two-dimensional half-filled Hubbard model at weak coupling…
Real-space cluster dynamical mean-field theory: Center focused extrapolation on the one- and two particle level
Marcel Klett, Nils Wentzell, Thomas Schäfer +4
We revisit the cellular dynamical mean-field theory (CDMFT) for the single band Hubbard model on the square lattice at half filling, reaching real-space cluster sizes of up to 9 x…
Linear resistivity and Sachdev-Ye-Kitaev (SYK) spin liquid behavior in a quantum critical metal with spin- fermions
Peter Cha, Nils Wentzell, Olivier Parcollet +2
`Strange metals' with resistivity depending linearly on temperature down to low- have been a long-standing puzzle in condensed matter physics. Here, we consider a model of i…
Magnetic response of SrRuO: quasi-local spin fluctuations due to Hund's coupling
Hugo U. R. Strand, Manuel Zingl, Nils Wentzell +2
We study the magnetic susceptibility in the normal state of SrRuO using dynamical mean-field theory including dynamical vertex corrections. Besides the well known incommens…
Conductivity in the square lattice Hubbard model at high temperatures: importance of vertex corrections
Jaksa Vucicevic, Jure Kokalj, Rok Zitko +3
Recent experiments on cold atoms in optical lattices allow for a quantitative comparison of the measurements to the conductivity calculations in the square lattice Hubbard model. H…