Breakdown of the Nagaoka phase at finite doping
Strongly Correlated Electrons
2017-04-18 v2
Abstract
The Nagaoka () limit of the Hubbard model on a square lattice is mapped onto the itinerant-localized Kondo model at infinitely strong coupling. Such a model is well suited to perform quantum Monte Carlo (QMC) simulations to compute spin correlation functions. This model is shown to exhibit no short-range ferromagnetic (FM) spin correlations at any doping and finite temperature, . Our simulations give no indication that there is a tendency towards ferromagnetic ordering in the ground state.
Cite
@article{arxiv.1612.03646,
title = {Breakdown of the Nagaoka phase at finite doping},
author = {Ilya Ivantsov and Alvaro Ferraz and Evgenii Kochetov},
journal= {arXiv preprint arXiv:1612.03646},
year = {2017}
}