高临界温度氧化物超导体的超导特征参量:λζ和Δ  

CHARACTERISTIC PARAMETERS λ, ξ AND Δ OF HIGH Tc OXIDE SUPERCONDUCTORS

作　　者：张其瑞[1] 许祝安[1] 王劲松[1] 方明虎[1] 

机构地区：[1]浙江大学物理系

出　　处：《物理学进展》1992年第4期436-479,共44页Progress In Physics

摘　　要：磁场穿透深度(λ)、相干长度(§)和能隙(△)是表征超导体处于超导态时其内禀特性的三个物理参量,是了解超导体的独特性质、探索超导机理和建立微观理论的依据和约束。本文在简要介绍传统超导体中有关λ、§和△的引入与测量方法的基础上,着重评述用于高Tc氧化物超导体中有关λ、§和△的新测量方法,以及目前对各种类型高Tc超导体所给出的实验结果。The penetration depth (λ), coherence length (ξ) and energy gap (△) are three parameters which, characterize the intrinsic properties of superconductors in superconducting state. Studies of these parameters provide bases and constraints on the mechanism of superconductivity and the microscopic theory of the superconducting state. In this paper, after an introduction for the concepts and measurement methods of λ, ξ and △ for conventional superconductors is given, it is emphasized that the new measurement methods and the up-to-date experimental results of λ, ξ and △ for various high-Tc superconducting oxides are reviewed.

关 键 词：超导体 氧化物 高温超导性 

分 类 号：O511.1[理学—低温物理]