Antiferromagnetism, Stripes, and Superconductivity in the t-J Model with Coulomb Interaction

Details Antiferromagnetism, Stripes, and Superconductivity in the t-J Model with Coulomb Interaction Antiferromagnetism, Stripes, and Superconductivity in the t-J Model with Coulomb Interaction

2000-06-02

arxiv.org/abs/cond-mat/0006046v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1142/S021797920100468X

We study mean-field phases of the t-J model with long-range Coulomb interaction. In the order of increasing doping density we find a classical antiferromagnet, charge and spin stripes, and a uniform d-wave superconductor, at the realistic doping parameters. Both in-phase and anti-phase stripes exist as metastable configurations, but the in-phase stripes have a slightly lower energy. The dependence of the stripe width and the inter-stripe spacing on the doping is examined. Effects of fluctuations around the mean-field states are discussed.

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