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The present study tries to investigate Wiedemann-Franz law near and far from the critical temperatures, given the tunneling between the grains in Cooper pair fluctuation propagator and impurity vertex. By means of Dyson’s equation, the Cooper pair fluctuation propagator, L(qkΩμ) and the Cooperon (impurity vertex), λ(q, k, ε1, ε2), are initially calculated in the presence of tunneling between the grains...
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