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The Mechanism of Surface Decomposition of Tl- and Hg-Containing Superconductors |
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| Authors: | W. Zhou D. A. Jefferson W. Y. Liang G. B. Peacock A. Asab I. Gameson P. P. Edwards |
| Affiliation: | (1) IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge, CB 3 0HE, United Kingdom;(2) Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom;(3) School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom |
| Abstract: | The surface chemistry of various Tl- and Hg-containing superconducting oxides has been studied by high resolution transmission electron microscopy. The mechanism of surface decomposition of these materials is discussed. High chemical reactivity of the Tl-O and Hg-O layers seem to be the main course of the decomposition. It is proposed that a surface substitution of Tl and Hg may stabilise the structures without losing superconducting properties. |
| Keywords: | Surface superconductors decomposition electron microscopy |
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