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Cation and anion disorder in HgBa2Can−1CunO2n+2+δ |
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| Authors: | Massimo Marezio Edgar T. Alexandre Pierre Bordet Jean-Jacques Capponi Catherine Chaillout Evgueni M. Kopnin Sergio M. Loureiro Paolo G. Radaelli Gustaaf Van Tendeloo |
| Affiliation: | 1. Laboratoire de Cristallographie CNRS, BP 166, 38042, Grenoble cedex 09, France 2. AT&T Bell Laboratory, 600 Mountain Ave., 07974, Murray Hill, NJ, USA 3. Institut Laue-Langevin, BP 156, 38042, Grenoble cedex 09, France 4. EMAT, University of Antwerp (RUCA), Groenenborglaan 171, B-2020, Antwerp, Belgium |
| Abstract: | Cu and C substitution for Hg in Hg-based cuprate superconductors is discussed. The large Hg Debye-Waller factor usually obtained from refinements based on diffraction data should be interpreted as an indication of carbon substitution for the Hg cations. This assumption is corroborated by HREM, powder x-ray anomalous dispersion, and powder neutron diffraction investigations. |
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