In-Plane Microwave Conductivity and Quasiparticle Scattering Rate of Superconducting High- T c Cuprates
In-Plane Microwave Conductivity and Quasiparticle Scattering Rate of Superconducting High- T c Cuprates
复制标题
超导高温铜酸盐的面内微波电导率和准粒子散射率
DOI：
10.1143/jpsj.65.3266
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发表时间：
1996
影响因子：
1.7
通讯作者：
K. Uchinokura
中科院分区：
文献类型：
--
作者：
T. Shibauchi;H. Kitano;A. Maeda;H. Asaoka;H. Takei;I. Shigaki;T. Kimura;K. Kishio;K. Izumi;Takuya Suzuki;K. Uchinokura
在 YBa 2 Cu 3 O 7 、Bi 2 Sr 2 CaCu 2 O 8 和 La 1.85 Sr 0.15 CuO 4 的单晶中测量了 9.6 GHz 和 51 GHz 的表面阻抗 Z s = R s + i X s 。在低温下，所有材料的表面电阻R s 均随温度线性变化，YBa 2 Cu 3 O 7 和Bi 2 Sr 2 CaCu 2 O 8 的表面电抗（穿透深度）也线性变化。根据Z s 数据，确定复电导率σ=σ 1 - iσ 2 和准粒子散射率1/τ。所有超导体都观察到了 σ 1 温度依赖性的宽峰状结构，该结构来自于 T c 以下的 1/τ 的强烈抑制。将使用广义二流体模型提取的低温散射率与YBa 2 Cu 3 O 7 中不同频率下已发表的数据进行比较。研究发现，低温下的非弹性散射率 1/τ 很大程度上取决于该模型中的测量频率 f。在微波区域，归一化散射率 τ n /τ i...
The surface impedance Z s = R s + i X s at 9.6 and 51 GHz was measured in single crystals of YBa 2 Cu 3 O 7 , Bi 2 Sr 2 CaCu 2 O 8 , and La 1.85 Sr 0.15 CuO 4 . At low temperatures, the surface resistance R s of all the materials changes linearly in temperature, and the surface reactance (penetration depth) also changes linearly in YBa 2 Cu 3 O 7 and Bi 2 Sr 2 CaCu 2 O 8 . From Z s data, the complex conductivity σ=σ 1 - iσ 2 and the quasiparticle scattering rate 1/τ were determined. The broad peak-like structure in the temperature dependence of σ 1 , which comes from strong suppression of 1/τ below T c , is observed for all the superconductors. The low-temperature scattering rate extracted using the generalized two-fluid model is compared with the published data at different frequencies in YBa 2 Cu 3 O 7 . It is found that the inelastic scattering rate 1/τ at low temperatures strongly depends on the measurement frequency f within this model. In the microwave region, the normalized scattering rate τ n /τ i...