Further Investigation on the Correlation between Ionization Potential and Superconductivity of Oxides |
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收稿时间: | 1994-11-28 |
Further Investigation on the Correlation between Ionization Potential and Superconductivity of Oxides |
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Authors: | Wei CHEM and Ruzhang MA |
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Affiliation: | Wei CHEM and Ruzhang MA(Dept. of Materials Physics,University of Science and Technology Bejing,Bejing,,China) |
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Abstract: | The relations of oxygen content, critical temperature TC and mean ionization potential < U0> of superconducting oxides are reported. We found that in oxides oxygen is the major element which governs their < U0> te values and thus oxygen content plays an jmportant role in their superconducting properties. As for Y(123)- and T1-systems oxygenation may improve their TC values, but for Biand Hg-systems oxygenation process is not so important. In Y(123), as the oxygen content increase results in the increase of TC upon < U0>to, while the substitution of Ba2+ by Sr2+ causes the decrease of TC upon < U0 >. These results may provide some clues about the superconductivity of oxides and support further that < Uo > is really a good criterion for oxide superconductivity. Two kinds of possible superconducting oxides are predicted in this paper according to the mean ionization potential criterion. |
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