Suppression of the superconducting gap and the spin-fluctuation gap of YBa2Cu3Oy (y=7.0 and 6.76) by Zn substitution as measured by Gd3+ electron-spin resonance

A. Jánossy, J. R. Cooper, L.-C. Brunel, and A. Carrington
Phys. Rev. B 50, 3442 – Published 1 August 1994; Erratum Phys. Rev. B 56, 11320 (1997)
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Abstract

The local susceptibility around Zn atoms in Gd-doped YBa2(Cu0.97Zn0.03)3Oy has been measured by the electron-spin-resonance Knight shift of Gd3+ at 245 GHz. The magnitude and distribution of the shifts are compared with the corresponding data for compounds with no Zn. For both y=7.0 and 6.76 the full density of states (corresponding to the high-temperature normal state of the pure y=7.0 compound) is restored at the first-neighbor sites of Zn atoms irrespective of whether the material is superconducting or not. This shows that both the superconducting gap and the spin-fluctuation gap are locally suppressed by Zn substitution.

  • Received 20 December 1993

DOI:https://doi.org/10.1103/PhysRevB.50.3442

©1994 American Physical Society

Erratum

Authors & Affiliations

A. Jánossy

  • Interdisciplinary Research Center in Superconductivity, University of Cambridge, Cambridge CB3 0HE, United Kingdom
  • Institute of Physics, Technical University of Budapest, H-1521 Budapest, Hungary

J. R. Cooper

  • Interdisciplinary Research Center in Superconductivity, University of Cambridge, Cambridge CB3 0HE, United Kingdom

L.-C. Brunel

  • High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Service National des Champs Intenses, 166X, 38042 Grenoble CEDEX, France

A. Carrington

  • Interdisciplinary Research Center in Superconductivity, University of Cambridge, Cambridge CB3 0HE, United Kingdom

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Vol. 50, Iss. 5 — 1 August 1994

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