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The paper has been withdrawn due to very low reproducibility

H. H. Wen·H. P. Yang·X. F. Lu·J. Yan
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Abstract

The paper has been withdrawn due to very low reproducibility. About 100 samples have been made, only 3 samples show the superconducting-like behavior. We think it may be an unlikely result.

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H. H. Wen, H. P. Yang, X. F. Lu, J. Yan. 2003-04-22. The paper has been withdrawn due to very low reproducibility. https://arxiv.org/abs/cond-mat/0303572

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