42 citations · 87 across the 7 of their papers we have counts for
7 papers
Benchmarking the Dual Fermion approach on the Falicov-Kimball model
Akshat Mishra, Hugo U. R. Strand, Erik G. C. P. van Loon
Strong electronic correlations generally require non-perturbative treatment. Local correlations are captured by dynamical mean-field theory while nonlocal correlations can be treat…
Magnons in multiorbital Hubbard models, from Lieb to kagome
Teng-Fei Ying, Hugo U. R. Strand, Benjamin T. Zhou +1
We investigate the magnetic orders and excitations in a half-filled Hubbard model that continuously interpolates between the Lieb and kagome lattices. Using self-consistent Hartree…
Static treatment of dynamic interactions in the single-orbital Anderson impurity model
Anton Pauli, Akshat Mishra, Malte Rösner +1
Correlated electron physics is intrinsically a multiscale problem, since high-energy electronic states screen the interactions between the correlated electrons close to the Fermi l…
From strong to weak correlations in breathing-mode kagome van der Waals materials: Nb(F,Cl,Br,I) as a robust and versatile platform for many-body engineering
Joost Aretz, Sergii Grytsiuk, Xiaojing Liu +12
By combining ab initio downfolding with cluster dynamical mean-field theory, we study the degree of correlations in monolayer, bilayer and bulk breathing-mode kagome van der Waals…
Two-particle Fermi liquid parameters at the Mott transition: Vertex divergences, Landau parameters, and incoherent response in dynamical mean-field theory
Friedrich Krien, Erik G. C. P. van Loon, Mikhail I. Katsnelson +2
We consider the interaction-driven Mott transition at zero temperature from the viewpoint of microscopic Fermi liquid theory. To this end, we derive an exact expression for the Lan…
Conservation in two-particle self-consistent extensions of dynamical-mean-field-theory
F. Krien, E. G. C. P. van Loon, H. Hafermann +3
Extensions of dynamical-mean-field-theory (DMFT) make use of quantum impurity models as non-perturbative and exactly solvable reference systems which are essential to treat the str…
Interaction-driven Lifshitz transition with dipolar fermions in optical lattices
E. G. C. P. van Loon, M. I. Katsnelson, L. Chomaz +1
Anisotropic dipole-dipole interactions between ultracold dipolar fermions break the symmetry of the Fermi surface and thereby deform it. Here we demonstrate that such a Fermi surfa…