Waterlike density anomaly in fermions
Statistical Mechanics
2023-10-10 v2 Strongly Correlated Electrons
Abstract
In this work we explore the one-dimensional extended Hubbard model as a fluid system modelling liquid phases of different densities. This model naturally displays two length scales of interaction, which are connected with waterlike anomalies. We analyze the density anomaly as a function of the model parameters, namely the hopping, on-site and first neighbor interactions. We show that this anomaly is present for a wide range of model parameters and is connected to a ground-state liquid-liquid critical point.
Cite
@article{arxiv.2306.01161,
title = {Waterlike density anomaly in fermions},
author = {Marco A. Habitzreuter and Eduardo O. Rizzatti and Marcia C. Barbosa},
journal= {arXiv preprint arXiv:2306.01161},
year = {2023}
}
Comments
15 pages, 9 figures