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

Abstract

Superconducting correlations in the two dimensional $\mathrm{t}-\mathrm{J}$ model at zero temperature are evaluated using numerical techniques. At the fermionic density $⟨n⟩\sim 1/2$, 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 $\mathrm{t}-\mathrm{J}$ model is presented.

13 pages (figures not included), FSU-MARTECH-92-05

References in corpus (1)

• Large N expansion for frustrated and doped quantum antiferromagnets

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