Ferromagnetic spin correlations in the two-dimensional Hubbard model
Strongly Correlated Electrons
2020-04-22 v1
Abstract
We analyze the dynamical nearest-neighbor and next-nearest-neighbor spin correlations in the 4-site and 8-site dynamical cluster approximation to the two-dimensional Hubbard model. Focusing on the robustness of these correlations at long imaginary times, we reveal enhanced ferromagnetic correlations on the lattice diagonal, consistent with the emergence of composite spin-1 moments at a temperature scale that essentially coincides with the pseudo-gap temperature . We discuss these results in the context of the spin-freezing theory of unconventional superconductivity.
Keywords
Cite
@article{arxiv.1912.01260,
title = {Ferromagnetic spin correlations in the two-dimensional Hubbard model},
author = {Philipp Werner and Xi Chen and Emanuel Gull},
journal= {arXiv preprint arXiv:1912.01260},
year = {2020}
}