Superconductivity in the quasi-two-dimensional Hubbard model
Xin-Zhong Yan
DOI 10.1103/PhysRevB.71.104520 · Physical Review B
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Abstract
On the basis of spin-pairing-fluctuation-exchange approximation, we study the superconductivity in the quasi-two-dimensional Hubbard model. The integral equations for the Green’s function are self-consistently solved by numerical calculation. Solutions for the order parameter, London penetration depth, density of states, and transition temperature are obtained. Some of the results are compared with the experiments for the cuprate high-temperature superconductors. Numerical techniques are presented in detail. With these techniques, the amount of numerical computations can be greatly reduced.
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