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Terahertz responses of high-resistivity YBCO thin films

机译：高电阻率YBCO薄膜的太赫兹响应

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We used pulse terahertz radiation to study the complex conductivity of high-resistivity YBCO thin films. The complex conductivity of YBCO superconducting thin films in the 50-300 GHz range was obtained. The temperature lambda(2)(0)/lambda(2) dependence of A (T) of such films exhibits a T-1 behavior which is closed to the prediction of the d-wave theory in the clean limit. However, its zero-temperature value is larger than that of typical high-quality single crystal YBCO. The temperature dependence of the real part of the conductivity below T, exhibits a frequency-dependent broad peak. Using the two-fluid Drude model for the superconducting state, the temperature dependence of the quasiparticle scattering rate is observed. The experimental result indicated that the quasiparticle scattering rate is higher than that reported on very-high-quality YBCO single crystals in the millimeter wave region. (C) 2003 Elsevier B.V. All rights reserved. [References: 32]
机译：我们使用脉冲太赫兹辐射来研究高电阻率YBCO薄膜的复电导率。获得了50-300 GHz范围内的YBCO超导薄膜的复电导率。此类薄膜的A（T）的温度lambda（2）（0）/ lambda（2）依赖性显示出T-1行为，该行为接近纯净极限中的d波理论预测。但是，其零温度值大于典型的高质量单晶YBCO的零温度值。低于T的电导率实部的温度依赖性显示出一个与频率有关的宽峰。使用用于超导状态的双流体Drude模型，观察到准粒子散射速率的温度依赖性。实验结果表明，在毫米波范围内，准粒子的散射率高于高质量的YBCO单晶。 （C）2003 Elsevier B.V.保留所有权利。 [参考：32]

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