Chain-Fragment Doping and the Phase Diagram of YBa2Cu3O7x

J. Zaanen, A. T. Paxton, O. Jepsen, and O. K. Andersen
Phys. Rev. Lett. 60, 2685 – Published 20 June 1988
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Abstract

We show, using a proposed oxygen-defect structure for YBa2Cu3O7x and a tight-binding model based on density-functional calculations, that the distribution of holes between planes and (fragmented) chains causes jumps and plateaus for the hole counts in the planes as a function of the nonstoichiometry, x. These features can be correlated with the occurrence of the antiferromagnetic as well as the 60- and 90-K superconducting phases. Our findings are supportive of the view that the hole count is the controlling parameter for the superconductivity.

  • Received 18 February 1988

DOI:https://doi.org/10.1103/PhysRevLett.60.2685

©1988 American Physical Society

Authors & Affiliations

J. Zaanen, A. T. Paxton, O. Jepsen, and O. K. Andersen

  • Max-Planck-Institut für Festkörperforschung D-7000 Stuttgart 80, Federal Republic of Germany

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Vol. 60, Iss. 25 — 20 June 1988

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