Indications of d_{x^2 - y^2} Superconductivity in the Two Dimensional t-J Model

Elbio Dagotto; Jose Riera

doi:10.1103/physrevlett.70.682

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Indications of d_{x^2 - y^2} Superconductivity in the Two Dimensional t-J Model

Elbio Dagotto·Jose Riera

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Abstract

Superconducting correlations in the two dimensional ${\rm t-J}$ model at zero temperature are evaluated using numerical techniques. At the fermionic density $\langle n \rangle \sim 1/2$, strong signals of $\dx2y2$ superconductivity were observed in the ground state. These conclusions are based on a study of static pairing correlations, the Meissner effect, flux quantization, and other indicators of superconductivity. It is argued that these results can be explained using a spin dimer ``liquid'' state. A phase diagram of the two dimensional ${\rm t-J}$ model is presented.

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Elbio Dagotto, Jose Riera. 1992-12-07. Indications of d_{x^2 - y^2} Superconductivity in the Two Dimensional t-J Model. https://doi.org/10.1103/physrevlett.70.682

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