Impurity Effects in Cuprate Superconductors
Impurity Effects in Cuprate Superconductors
复制标题
铜酸盐超导体中的杂质效应
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Hotta
中科院分区：
文献类型：
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作者：
T. Hotta
为了提取高温c超导体中库珀对的对称性信息，我们研究了非磁性杂质对二维二维配对态密度的影响。方形格子。假设的状态是 s 波、扩展 s 波和 d 波配对状态。只有当我们假设诸如d波配对之类的各向异性配对状态时，我们才能解释在Zn掺杂YBa 2 Cu 3 O 7-δ 中观察到的核自旋弛豫率的实验结果。
In order to extract the information on the symmetry of the Cooper pair in high- T c superconductors, we study non-magnetic impurity effects on the density of states for several pairing states in 2-dim. square lattice. The assumed states are s-, extended s- and d-wave pairing ones. Only when we assume an anisotropic pairing state such as a d-wave pairing, we can explain the experimental results on nuclear spin relaxation rate observed in Zn-doped YBa 2 Cu 3 O 7-δ .