Significance of the Cu-O chain and a percolation model for superconductivity in YBa2Cu3O7−δ

Y. Kubo; H. Igarashi

doi:10.1103/PhysRevB.39.725

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Significance of the Cu-O chain and a percolation model for superconductivity in YBa2Cu3O7−δ

Y. Kubo, H. Igarashi

DOI 10.1103/PhysRevB.39.725 · Physical Review B

T1

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Abstract

Percolative superconductivity observed in oxygen-deficient YBa2Cu3O7−δ is well understood in terms of inhomogeneous superconductivity in a homogeneous solid-solution phase, using a percolation model of a two-dimensional square lattice. The inhomogeneity is considered to be related to the very short coherence length of 20-30 Å in this material. It is also concluded that the very local oxygen ordering on the Cu(1) plane is significant for superconductivity.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	60	Pressure not reported	unknown