Testing the relation of a spin gap to superconductivity in the copper oxides

J.-S. Zhou; J. B. Goodenough

doi:10.1103/PhysRevB.54.11997

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Testing the relation of a spin gap to superconductivity in the copper oxides

J.-S. Zhou, J. B. Goodenough

DOI 10.1103/PhysRevB.54.11997 · Physical Review B

T1

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Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

In the hope of demonstrating the influence of a spin gap on the transport properties in underdoped cuprates, it has been suggested that the opening of a spin gap at Ts may correlate with a change at TD in the slope of the a-axis resistivity versus temperature observed in a YBa2Cu4O8 crystal. Comparison of ρa in YBa2Cu4O8 with ρa in a fully oxygenated, twin-free YBa2Cu3O7−δ crystal leads to the conclusion that TD has little to do with the opening of a spin gap, but it might be correlated with a change in the c-axis coupling in YBa2Cu4O8 and YBa2Cu3O7−δ. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown