On the pseudogap phase in high-T_c superconductors

Details On the pseudogap phase in high-T_c superconductors On the pseudogap phase in high-T_c superconductors

2000-03-23

arxiv.org/abs/cond-mat/0003378v1

Physics

Condensed Matter

Superconductivity

3 figures. to appear in PRL

Scientific paper

10.1103/PhysRevLett.84.5200

We describe the approach of the superconducting state as a sequence of cross-over phenomena. As the temperature is decreased, uncorrelated pairing of the electrons leads to the opening of a pseudogap at T_F^*. Upon further lowering the temperature those electron pairs acquire well behaved itinerant features at T_B^*, leading to partial Meissner screening and Drude type behavior of the optical conductivity. Further decrease of the temperature leads to their condensation and superconductivity at T_c. The analysis is done on the basis of the Boson-Fermion model in the cross-over regime between 2D and 3D.

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