From BCS to BEC Superconductivity: Spectroscopic Consequences

Details From BCS to BEC Superconductivity: Spectroscopic Consequences From BCS to BEC Superconductivity: Spectroscopic Consequences

1998-10-27

arxiv.org/abs/cond-mat/9810370v1

Acta Phys. Pol. 99, 691 (2001)

Physics

Condensed Matter

Superconductivity

4 pages, 5 epsf figures

Scientific paper

The evolution from BCS to BEC superconductivity in the s-wave and d-wave channels is analyzed at zero temperature for a two-dimensional superconductor. Spectroscopic quantities for s-wave and d-wave systems present fundamental differences when particle density and attraction strength are varied. A detailed analysis of single quasiparticle properties (excitation spectrum, momentum distribution, spectral function and density of states) indicates that the evolution of these spectroscopic quantities in the d-wave case is not smooth, unlike the situation encountered for the s-wave system.

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