Spin and Charge Excitations in the Two-Dimensional t-J Model: Comparison with Fermi and Bose Systems

Details Spin and Charge Excitations in the Two-Dimensional t-J Model: Comparison with Fermi and Bose Systems Spin and Charge Excitations in the Two-Dimensional t-J Model: Comparison with Fermi and Bose Systems

1999-12-14

arxiv.org/abs/cond-mat/9912269v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 figures. Contact the first author for higher resolution versions of the color figures

Scientific paper

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.

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