Superconducting transitions from the pseudogap state: d-wave symmetry, lattice, and low-dimensional effects
Qijin Chen, Ioan Kosztin, Boldizsár Jankó, K. Levin
DOI 10.1103/PhysRevB.59.7083 · Physical Review B
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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 Tc 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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