MICROWAVE SURFACE IMPEDANCE AT 10 GHZ AND QUASI-PARTICLE SCATTERING IN YBA2CU3O7 FILMS

被引：51

作者：

GAO, F

KRUSE, JW

PLATT, CE

FENG, M

KLEIN, MV

机构：

[1] UIUC,DEPT PHYS,URBANA,IL

[2] UIUC,MAT RES LAB,URBANA,IL

[3] UIUC,DEPT ELECT & COMP ENGN,URBANA,IL

来源：

APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 16期

关键词：

D O I：

10.1063/1.110527

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The surface impedance of superconducting YBa2Cu3O7 films as a function of temperature at 10 GHz has been measured in a parallel plate resonator geometry. The penetration depth lambda(T), complex microwave conductivity sigma(T), and quasiparticle scattering rate 1/tau(T) were also determined. After a rapid fall as T is lowered below T(c), the surface resistance R(s) exhibits a linear dependence from 65 K down to 6 K. As T drops below T(c), the real part of the conductivity sigma1 has a rapid rise, which is attributed to the observed dramatic increase in tau. The normal-fluid density shows a linear behavior at low temperatures, which is inconsistent with s-wave BCS superconductivity.

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页码：2274 / 2276

页数：3

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