Variation of superconductivity with carrier concentration in oxygen-doped YBa2Cu3O7-y

Z. Z. Wang, J. Clayhold, N. P. Ong, J. M. Tarascon, L. H. Greene, W. R. McKinnon, G. W. Hull

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The Hall coefficient RH, the volume fraction f showing the Meissner effect, and the superconducting transition temperature Tc have been measured in the high-Tc oxide YBa2Cu3O7-y for a range of oxygen vacancy concentration 0.0<y<0.7. We find that RH, f, and Tc are insensitive to y over the range 0.1<y<0.5. In this range, superconductivity at 55 K is possible (with a carrier density of 1.4×1021 cm-3), even with severe loss of connectivity in the CuO chains. The data are consistent with superconductivity occurring only in the CuO planes. A sharp transition in RH is also seen when y exceeds 0.50.

Original languageEnglish (US)
Pages (from-to)7222-7225
Number of pages4
JournalPhysical Review B
Issue number13
StatePublished - 1987

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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