Spin and Charge Excitations in the Two-Dimensional t-J Model: Comparison with Fermi and Bose Systems
Abstract
Using high temperature series we calculate temperature derivatives of the spin-spin and density-density correlation functions to investigate the low energy spin and charge excitations of the two-dimensional t-J model. We find that the temperature derivatives indicate different momentum dependences for the low energy spin and charge excitations. By comparing short distance density-density correlation functions with those of spinless fermions and hard core bosons, we find that the t-J model results are intermediate between the two cases, being closer to those of hard core bosons. The implications of these results for superconductivity are discussed.
Cite
@article{arxiv.cond-mat/9912269,
title = {Spin and Charge Excitations in the Two-Dimensional t-J Model: Comparison with Fermi and Bose Systems},
author = {W. O. Putikka and M. U. Luchini and R. R. P. Singh},
journal= {arXiv preprint arXiv:cond-mat/9912269},
year = {2007}
}
Comments
4 pages, 6 figures. Contact the first author for higher resolution versions of the color figures