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Superconductivity at 27 K in fluorine-doped Nd2Cu04

Superconductivity at 27 K in fluorine-doped Nd2Cu04 THE recent report1 of superconductivity in Nd1,85Ce0.15CuO4 is the first example of a high-transition-temperature (high– T c) super-conductor with electrons as the charge carriers and a formal copper oxidation state of less than +2. All previously characterized copper oxide superconductors are hole-doped, and the copper is formally oxidized. Here we show that substitution of fluorine for oxygen in T′-phase Nd2CuO4 provides an alternative route to achieving formal reduction of copper, electron conductivity and superconductivity at temperatures as high as 27 K. This result is unusual, because anionic rather than cationic substitution gives rise to the superconductivity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Springer Journals

Superconductivity at 27 K in fluorine-doped Nd2Cu04

James, A. C. W. P.; Murphy, D. W.; Zahurak, S. M.
Nature , Volume 338 (6212) – Mar 16, 1989
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References (5)

Publisher
Springer Journals
Copyright
Copyright © 1989 by Nature Publishing Group
Subject
Science, Humanities and Social Sciences, multidisciplinary; Science, Humanities and Social Sciences, multidisciplinary; Science, multidisciplinary
ISSN
0028-0836
eISSN
1476-4687
DOI
10.1038/338240a0
Publisher site
See Article on Publisher Site

Abstract

THE recent report1 of superconductivity in Nd1,85Ce0.15CuO4 is the first example of a high-transition-temperature (high– T c) super-conductor with electrons as the charge carriers and a formal copper oxidation state of less than +2. All previously characterized copper oxide superconductors are hole-doped, and the copper is formally oxidized. Here we show that substitution of fluorine for oxygen in T′-phase Nd2CuO4 provides an alternative route to achieving formal reduction of copper, electron conductivity and superconductivity at temperatures as high as 27 K. This result is unusual, because anionic rather than cationic substitution gives rise to the superconductivity.

Journal

Nature – Springer Journals

Published: Mar 16, 1989

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