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Occurrence of maximumTcat an optimal carrier concentration in superconducting bismuth and thallium cuprates

 

作者: P. Somasundaram,   R. Vijayaraghavan,   R. Nagarajan,   Ram Seshadri,   A. M. Umarji,   C. N. R. Rao,  

 

期刊: Applied Physics Letters  （AIP Available online 1990）
卷期: Volume 56, issue 5  

页码: 487-489

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.103296

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The superconducting transition temperatures in Bi2Ca1−xLnxSr2Cu2O8+&dgr;, TlCa1−xLnxSr2Cu2O6+&dgr;, and Tl0.8Ca1−xLnxBa2Cu23O6+&dgr;(Ln=Y or rare earth) vary with composition and show a maximum at a specific value ofxor &dgr;. This observation suggests that an optimal carrier concentration is required to attain maximumTcin such cuprates which seem to be two‐band systems.

 

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