Correlation of Tc with Hole Concentration in Copper-Oxide Superconductors; Hall Effect Measurement in Nd1+xBa2-xCu3O7-δ
Correlation of Tc with Hole Concentration in Copper-Oxide Superconductors; Hall Effect Measurement in Nd1+xBa2-xCu3O7-δ
复制标题
氧化铜超导体中 Tc 与空穴浓度的相关性；Nd1+xBa2-xCu3O7-δ 霍尔效应测量
DOI：
10.1143/jjap.27.l607
复制
发表时间：
1988
影响因子：
1.5
通讯作者：
K. Masuda
中科院分区：
文献类型：
--
作者：
K. Takita;H. Akinaga;H. Katoh;K. Masuda
本文作者在前一篇论文中提出的Nd1+xBa2-xCu3O7-δ中的空穴浓度补偿效应和Tc与氧化铜型超导体中空穴浓度的简单相关性，已经得到霍尔效应测量的支持。由霍尔系数RH推导出的有效空穴浓度pH （=1/RHe）随x的增加而减小。在本体系中得到的Tc随pH的曲线与掺氧YBa2Cu3O7-δ非常相似，尽管两种体系的氧含量δ不同。这表明，在测定铜氧化物超导体的超导性时，空穴浓度是比氧含量δ更重要的参数。
Hole concentration compensation effect in Nd1+xBa2-xCu3O7-δ and a simple correlation of Tc with the hole concentration in copper-oxide-type superconductors, proposed in a previous paper by the present authors, have been supported by the Hall effect measurement. The effective hole concentration pH (=1/RHe) deduced from the Hall coefficient, RH, decreases with increasing x. The plot of Tc against pH obtained in the present system is very similar to that of oxygen-doped YBa2Cu3O7-δ in spite of that the two systems differ in the oxygen content, δ. This suggests that the hole concentration is a more essential parameter than the oxygen content δ, in determining the superconductivity of copper-oxide superconductors.