Microwave surface impedance at 10 GHz and quasiparticle scattering in YBa2Cu3O7 films
- 18 October 1993
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 63 (16) , 2274-2276
- https://doi.org/10.1063/1.110527
Abstract
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 λ(T), complex microwave conductivity σ(T), and quasiparticle scattering rate 1/τ(T) were also determined. After a rapid fall as T is lowered below Tc, the surface resistance Rs exhibits a linear dependence from 65 K down to 6 K. As T drops below Tc, the real part of the conductivity σ1 has a rapid rise, which is attributed to the observed dramatic increase in τ. The normal‐fluid density shows a linear behavior at low temperatures, which is inconsistent with s‐wave BCS superconductivity.Keywords
This publication has 17 references indexed in Scilit:
- Precision measurements of the temperature dependence of λ in : Strong evidence for nodes in the gap functionPhysical Review Letters, 1993
- Infrared properties of epitaxial thin films in the normal and superconducting statesPhysical Review B, 1993
- Magnetic penetration depth measurements in cuprate superconductorsJournal of Superconductivity, 1992
- Evidence for rapid suppression of quasiparticle scattering below inPhysical Review Letters, 1992
- Quasiparticle damping in andPhysical Review Letters, 1992
- Penetration depth and microwave loss measurements with a YBa2Cu3O7−δ/LaAlO3/YBa2Cu3O7−δ trilayer transmission lineApplied Physics Letters, 1991
- Observation of the conductivity coherence peak in superconducting single crystalsPhysical Review Letters, 1991
- Dynamic conductivity and coherence peak in superconductorsPhysical Review Letters, 1991
- Far-infrared transmittance and reflectance studies of oriented thin filmsPhysical Review B, 1991
- Far-Infrared Absorption in Thin Superconducting Lead FilmsPhysical Review B, 1968