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We investigate the Fermi-liquid parameters and the superconducting instabilities of the t-J model using a systematic large-N expansion. We compare our results with the predictions of the Brinkman-Rice picture. The leading superconducting instability is in the d-wave channel and has cosKₓ-cosKy symmetry and increases with doping.
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Grilli et al. (1990) studied this question.
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