Spin Gap and Superconductivity in the One-Dimensional t-J Model with Coulomb Repulsion
Condensed Matter
2007-05-23 v1
Abstract
The one-dimensional t-J model with density-density repulsive interactions is investigated using exact diagonalization and quantum Monte Carlo methods. A short-range repulsion pushes phase separation to larger values of J/t, and leads to a widened precursor region in which a spin gap and strengthened superconducting correlations appear. The correlation exponent is calculated. On the contrary, a long-range repulsion of -form suppresses superconductivity in the precursor region.
Keywords
Cite
@article{arxiv.cond-mat/9212031,
title = {Spin Gap and Superconductivity in the One-Dimensional t-J Model with Coulomb Repulsion},
author = {M. Troyer and H. Tsunetsugu and T. M. Rice and J. Riera and E. Dagotto},
journal= {arXiv preprint arXiv:cond-mat/9212031},
year = {2007}
}
Comments
26 pages (RevTeX), 10 figures available upon request as PostScript file or hardcopy, IPS-Report Nr. 93/01