Theory of Superconductivity on the Attractive Hubbard Model in the Strong Coupling Limit

概要

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The superconducting transition temperature is calculated on the simplest one-band Hubbard model with the negative U in the strong coupling region. Solving the selfconsistent equation for renormalization factor λ which renormalizes the effect of the interaction in all orders of U, dependence of superconducting transition temperature on interaction in the strong coupling region is obtained. Resulting behavior of the transition temperature is consistent with physical intuition. T_e decreases in proportion to t^2 / | U | and T_e → 0 at | U | → ∞.
琉球大学理学部の論文