The pairing susceptibility of the one-dimensional t-J model is examined numerically by the quantum transfer matrix method. The temperature dependence of the pairing susceptibility χ s shows logarithmic behavior at low temperatures as χ s ∼αlog T for T being the temperature. The coefficient α is determined as a function of J / t and the fillingness for J and t being the exchange interaction and the transfer. Beyond that of noninteracting fermions, α grows rapidly with the increase of | J |.
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Masatoshi Imada (1990) studied this question.
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