Theory of giant and nil proximity effects in cuprate semiconductors

Details Theory of giant and nil proximity effects in cuprate semiconductors Theory of giant and nil proximity effects in cuprate semiconductors

2006-07-28

arxiv.org/abs/cond-mat/0607770v3

Phys. Rev. B 75, 132501 (2007)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.75.132501

A number of observations point to the possibility that high-Tc cuprate superconductors may not be conventional Bardeen-Cooper-Schrieffer (BCS) superconductors, but rather derive from the Bose-Einstein condensation (BEC) of real-space pairs, which are mobile small bipolarons. A solution of the Gross-Pitaevskii equation describing bose-condensate tunnelling into a cuprate semiconductor is analytically found. It accounts qualitatively and quantitatively for nil and giant proximity effects discovered experimentally in cuprates.

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