摘要
Filamentary superconductivity have been observed below Tc of 14 K for sintered-polycrystalline (Pb0.5Cu0.5)2(Ba0.5Sr 0.5)2 YCu2O8 samples. Low electrical resistivity shows that this semiconducting sample is near the boundary of metal-insulator transition. The observed filamentary superconductivity indicates that the oxygen concentration of the sample (Pb0.5Cu0.5)2(Ba0.5Sr 0.5)2 YCu2O8-δ is inhomogeneous. The oxygen off-stoichiometric parameter 6 plays the role of controlling the variation of free charge carriers in this electronically inhomogeneous sample where part of the sample is across the transition boundary and thus becomes superconducting.
原文 | 英語 |
---|---|
頁(從 - 到) | 579-582 |
頁數 | 4 |
期刊 | Chinese Journal of Physics |
卷 | 34 |
發行號 | 2 II |
出版狀態 | 已發佈 - 1996 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 一般物理與天文學