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Superconducting transitions from the pseudogap state: d-wave symmetry, lattice, and low-dimensional effects

Qijin Chen·Ioan Kosztin·Boldizsar Janko·K. Levin
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Abstract

We investigate the behavior of the superconducting transition temperature within a previously developed BCS-Bose Einstein crossover picture. This picture, based on a decoupling scheme of Kadanoff and Martin, further extended by Patton, can be used to derive a simple form for the superconducting transition temperature in the presence of a pseudogap. We extend previous work which addressed the case of s-wave pairing in jellium, to explore the solutions for T_c as a function of variable coupling in more physically relevant situations. We thereby ascertain the effects of reduced dimensionality, periodic lattices and a d-wave pairing interaction. Implications for the cuprate superconductors are discussed.

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Qijin Chen, Ioan Kosztin, Boldizsar Janko, K. Levin. 1999-03-09. Superconducting transitions from the pseudogap state: d-wave symmetry, lattice, and low-dimensional effects. https://doi.org/10.1103/physrevb.59.7083

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