Superconducting phase diagram in Ca2−xNaxCuO2Cl2−yBry
Superconducting phase diagram in Ca2−xNaxCuO2Cl2−yBry
复制标题
Ca2−xNaxCuO2Cl2−yBry 中的超导相图
DOI：
10.1016/j.physc.2004.12.002
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发表时间：
2005
影响因子：
1.7
通讯作者：
J. Akimitsu
中科院分区：
文献类型：
--
作者：
Y. Zenitani;Teruhiko Suzuki;H. Kawashima;J. Akimitsu
摘要Ca 2CuO 2Cl 2 − yBry（0 y 2）具有K2 NiF 4型结构，卤素（Cl和Br）位于其顶端位置，可以通过用Na+取代Ca 2+位置来实现超导电性。我们通过特别关注Ca 2 − xNaxCuO 2Cl 2 − yBry中Cu和Cl/Br距离与超导电性之间的关系，成功地绘制了Ca 2 − xNaxCuO 2Cl 2 − yBry的全面超导相图。我们成功地连续改变了c轴的长度，这是密切相关的顶端网站和CuO 2平面之间的距离，或Cu和Cl/Br之间的距离。而不改变Cu和O在CuO 2平面上的成键距离。这是铜氧化物超导体中这种控制的第一个例子。
Abstract Ca2CuO2Cl2− yBry (0⩽ y⩽ 2) has the K2NiF4-type structure with halogens (Cl and Br) at their apical sites and superconductivity can be achieved by substituting Ca2+ sites with Na+. We have succeeded in making a comprehensive superconducting phase diagram of Ca2− xNaxCuO2Cl2− yBry by focusing on special attention to the relationship between the superconductivity and the Cu and Cl/Br distance in Ca2− xNaxCuO2Cl2− yBry. We were successful in continuously changing the length of c-axis, which is closely related to the distance between the apical site and the CuO2 plane, or the distance between Cu and Cl/Br. Without changing the bonding distance between Cu and O in the CuO2 plane. This is the first example of this kind of control in cuprate superconductors.