Microwave electrodynamics of electron-doped cuprate superconductors

被引：112

作者：

Kokales, JD ^{[1
]}

Fournier, P ^{[1
]}

Mercaldo, LV ^{[1
]}

Talanov, VV ^{[1
]}

Greene, RL ^{[1
]}

Anlage, SM ^{[1
]}

机构：

[1] Univ Maryland, Ctr Superconduct Res, Dept Phys, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.85.3696

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report microwave cavity perturbation measurements of the temperature dependence of the penetration depth, lambda>(*) over bar * (T), and conductivity, sigma>(*) over bar * (T) of Pr2-xCexCuO4-delta (PCCO) crystals, as well as parallel-plate resonator measurements of A(T) in PCCO thin films. Penetration depth measurements are also presented for a Nd2-xCexCuO4-delta (NCCO) crystal. We find that Deltah(T) has a power-law behavior for T < T-c/3, and conclude that the electron-doped cuprate superconductors have nodes in the superconducting gap. Furthermore, using the surface impedance, we have derived the real part of the conductivity, <sigma>(1)(T), below T-c and found a behavior similar to that observed in hole-doped cuprates.

引用

页码：3696 / 3699

页数：4

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