278 citations · 304 across the 5 of their papers we have counts for
4 papers · 1 filter
Constrained Random Phase Approximation of the effective Coulomb interaction in lattice models of twisted bilayer graphene
Tuomas I. Vanhala, Lode Pollet
Recent experiments on twisted bilayer graphene show the urgent need for establishing a low-energy lattice model for the system. We use the constrained random phase approximation to…
Magnetization, d-wave superconductivity and non-Fermi liquid behavior in a crossover from dispersive to flat bands
Pramod Kumar, Tuomas I. Vanhala, Päivi Törmä
We explore the effect of inhomogeneity on electronic properties of the two-dimensional Hubbard model on a square lattice using dynamical mean-field theory (DMFT). The inhomogeneity…
Temperature and doping induced instabilities of the repulsive Hubbard model on Lieb lattice
Pramod Kumar, Tuomas I. Vanhala, Päivi Törmä
The properties of a phase at finite interactions can be significantly influenced by the underlying dispersion of the non-interacting Hamiltonian. We demonstrate this by studying th…
A dynamical mean-field theory study of stripe order and d-wave superconductivity in the two-dimensional Hubbard model
Tuomas I. Vanhala, Päivi Törmä
We use cellular dynamical mean-field theory with extended unit cells to study the ground state of the two-dimensional repulsive Hubbard model at finite doping. We calculate the ene…