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Tuning of superconductivity above 100 K in TlSr2CaCu2Oz by cation substitutions
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-07-29 , DOI: 10.1016/j.physb.2020.412407
H.K. Lee , S.S. Lee , R. Abd-Shukor

In the Tl-based compound TlSr2CaCu2O7 (Tl-1212), single substitution (Pb or rare-earth element) only achieves a Tc of 80–90 K, and double substitutions (Pb and rare-earth element) have been considered necessary to enhance the Tc of the Tl-1212 phase to above 100 K. In this work, we found that superconductivity above 100 K could be achieved in both of (Tl1-xBix)Sr2(Ca0.8Pr0.2)Cu2Oz and (Tl1-x-yPbxBiy)Sr2CaCu2Oz systems, in addition to the well-known (Tl0.5Pb0.5)Sr2(Ca0.8Pr0.2)Cu2Oz compound. These results indicate that either the substitution of the rare-earth element or such double substitutions are not essential for enhancing the Tc to above 100 K in the Tl-1212 phase.



中文翻译:

通过阳离子取代在TlSr 2 CaCu 2 O z中调节100 K以上的超导

在基于Tl的化合物TlSr 2 CaCu 2 O 7(Tl-1212)中,单取代(Pb或稀土元素)仅达到80–90 K的T c,而双取代(Pb和稀土元素)认为必须将Tl-1212相的T c提高到100 K以上。在这项工作中,我们发现在(Tl 1-x Bi x)Sr 2(Ca 0.8 Pr 0.2)Cu 2 O z和(Tl 1-xy Pb x Bi y)Sr 2除了众所周知的(Tl 0.5 Pb 0.5)Sr 2(Ca 0.8 Pr 0.2)Cu 2 O z化合物外,还包括CaCu 2 O z系统。这些结果表明,稀土元素的取代或这种双重取代对于在Tl-1212相中将T c提高至100 K以上不是必需的。

更新日期:2020-08-03
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