Physics – Condensed Matter – Superconductivity
Scientific paper
1999-08-25
Phys. Rev. Lett. 85, 2801 (2000)
Physics
Condensed Matter
Superconductivity
REVTeX 3.1, 4 pages, 3 EPS figures, significant revisions, to appear in PRL
Scientific paper
10.1103/PhysRevLett.85.2801
In this paper we present predictions for thermodynamic and transport properties of a BCS Bose-Einstein crossover theory, below Tc, which theory satisfies the reasonable constraints that it yield (i) the Leggett ground state and (ii) BCS theory at weak coupling and all temperatures. The nature of the strong coupling limit is inferred, along with the behavior of the Knight shift, superfluid density, and specific heat. Comparisons with existing data on short coherence length superconductors, such as organic and high Tc systems, are presented, which provide some support for the present picture.
Chen Qijin
Kosztin Ioan
Levin Kathryn
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