铜氧化物的晶体结构参量与超导电性  

Crystal structure parameters and superconductivity in copper oxides

作　　者：唐纯青[1] 

机构地区：[1]陕西师范大学物理学系

出　　处：《陕西师大学报（自然科学版）》1995年第3期33-36,共4页Journal of Shaanxi Normal University(Natural Science Edition)

摘　　要：以ｄＡ（ＣｕＯ２面上Ｃｕ（Ｐ）和项角氧Ｏ（Ａ）键长）对Ｖｄ［沿Ｃｕ（Ｐ）－Ｏ（Ａ）键和沿Ｃｕ（Ｐ）－Ｏ（Ｐ）键方向一个空穴的平均Ｍａｄｅｌｕｎｇ位势差］做图，发现所有铜氧化物超导体的转变温度和结构参量存在一确定的变化规律，不同超导系统被明显地分离开来，Ｔｃ既随ｄＡ也随Ｖｄ的增大而增大．本文从晶体结构的角度分析了产生该现象的原因．The critical temperature Tc of cuprate superconductors has been mapped on to a dA-Vd plane where Md is an average of the potential differences, those along the Cu (P)-O (A) bond direction minus those along the Cu (P)-O(P) bond directions and dA is the Cu(P)O(A) bond length. It is found that the material with a larger Vd tend to have a larger dA,and that Tc increases either with the increase of Vd or with the increases of dA. Structural features effecting Tc are also discussed.

关 键 词：结构参量 超导电性 超导体 氧化铜 晶体结构 

分 类 号：TM262[一般工业技术—材料科学与工程] O511.2[电气工程—电工理论与新技术]