Anisotropic microwave conductivity of cuprate superconductors in the presence of CuO chain-induced impurities
Anisotropic microwave conductivity of cuprate superconductors in the presence of CuO chain-induced impurities
复制标题
CuO链诱导杂质存在下铜酸盐超导体的各向异性微波电导率
DOI：
10.1103/physrevb.80.174507
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发表时间：
2009-08
影响因子：
3.7
通讯作者：
Feng, Shiping
中科院分区：
文献类型：
--
作者：
Wang, Zhi;Feng, Shiping
The anisotropy in the microwave conductivity of the ortho-II ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{6.50}$ is studied within the kinetic-energy driven superconducting mechanism. The ortho-II ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{6.50}$ is characterized by a periodic alternative of filled and empty $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{b}$-axis CuO chains. By considering the CuO chain-induced extended anisotropy impurity scattering, the main features of the anisotropy in the microwave conductivity of the ortho-II ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{6.50}$ are reproduced based on the nodal approximation of the quasiparticle excitations and scattering processes, including the intensity and line shape of the energy and temperature dependences of the $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{a}$-axis and $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{b}$-axis microwave conductivities. Our results also confirm that the $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{b}$-axis CuO chain-induced impurity is the main source of the anisotropy.
The anisotropy in the microwave conductivity of the ortho-II ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{6.50}$ is studied within the kinetic-energy driven superconducting mechanism. The ortho-II ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{6.50}$ is characterized by a periodic alternative of filled and empty $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{b}$-axis CuO chains. By considering the CuO chain-induced extended anisotropy impurity scattering, the main features of the anisotropy in the microwave conductivity of the ortho-II ${\text{YBa}}_{2}{\text{Cu}}_{3}{\text{O}}_{6.50}$ are reproduced based on the nodal approximation of the quasiparticle excitations and scattering processes, including the intensity and line shape of the energy and temperature dependences of the $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{a}$-axis and $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{b}$-axis microwave conductivities. Our results also confirm that the $\stackrel{\ifmmode \hat{}\else \^{}\fi{}}{b}$-axis CuO chain-induced impurity is the main source of the anisotropy.