Theory of giant and nil proximity effects in cuprate semiconductors

A. S. Alexandrov

doi:10.1103/PhysRevB.75.132501

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Theory of giant and nil proximity effects in cuprate semiconductors

A. S. Alexandrov

DOI 10.1103/PhysRevB.75.132501 · Physical Review B

T1

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Abstract

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

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	45	Pressure not reported	unknown
La2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	25	Pressure not reported	unknown