Phase separation at all interaction strengths in the t-J model
Strongly Correlated Electrons
2009-10-28 v3 Superconductivity
Abstract
We investigate the phase diagram of the two-dimensional t-J model using a recently developed Green's Function Monte Carlo method for lattice fermions. We use the technique to calculate exact ground-state energies of the model on large lattices. In contrast to many previous studies, we find the model phase separates for all values of J/t. In particular, it is unstable at the hole dopings and interaction strengths at which the model was thought to describe the cuprate superconductors.
Keywords
Cite
@article{arxiv.cond-mat/9611195,
title = {Phase separation at all interaction strengths in the t-J model},
author = {C. Stephen Hellberg and E. Manousakis},
journal= {arXiv preprint arXiv:cond-mat/9611195},
year = {2009}
}
Comments
Revtex, 4 pages, 3 figures. Some minor changes were made to the text and figures, and some references were added