Superconductivity in correlated wave functions
Claudius Gros
DOI 10.1103/PhysRevB.38.931 · Physical Review B
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Abstract
We describe a new method to numerically evaluate the properties of correlated superconducting wave functions. We have applied it to the resonating-valence-bond (RVB) wave function for the Hubbard model on the square lattice. For the half-filled case we find that the d-wave RVB state and the antiferromagnetic ordered state have the same energy within numerical accuracy. At 10% doping we find d-wave superconductivity, consistent with previous studies. We show that the superconducting order parameter is proportional to the number of holes, for small hole concentrations.
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