Model for the role of oxygen defects in oxygen-defect superconductors

J. W. Halley; Herbert B. Shore

doi:10.1103/PhysRevB.37.525

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Model for the role of oxygen defects in oxygen-defect superconductors

J. W. Halley, Herbert B. Shore

DOI 10.1103/PhysRevB.37.525 · Physical Review B

T1

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Abstract

We propose that oxygen defects provide a mechanism for pairing enhancement in oxide-defect superconductors. A model is formulated and mean-field Gorkov equations are derived and solved numerically for a two-dimensional realization of the model. We show that very high-temperature critical temperatures are not difficult to understand in such models. Several experimental features of the superconducting oxides, including spin-glass-like properties, sensitivity to oxygen concentration, and temperature dependence of positron annihilation times, appear to be qualitatively consistent with such a model.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O9-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LaCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown