Superconducting properties of the 2D models with different types of inter-particle coupling

Details Superconducting properties of the 2D models with different types of inter-particle coupling Superconducting properties of the 2D models with different types of inter-particle coupling

2003-05-08

arxiv.org/abs/cond-mat/0305162v1

Physics

Condensed Matter

Superconductivity

To be published in 'Horizons in Superconductivity Research', Nova Science

Scientific paper

The superconducting properties of the 2D fermion system with local and different types of the indirect boson-exchange attractions in the cases of s-wave and d-wave pairing are reviewed and analysed at T=0. In particular, the possibility of the crossover from the Bose-Einstein condensation regime to the BCS-like superconductivity with the carrier density and coupling changing in the case of different pairing channels is discussed. Gaussian fluctuations of the order parameter are taken into account and the carrier density dependence of the gap is studied in this case. The role of the interaction form in the physical behavior of the systems is also discussed.

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