Angular position of nodes in the superconducting gap of quasi-2D heavy-fermion superconductor CeCoIn5 -: art. no. 057002
Angular position of nodes in the superconducting gap of quasi-2D heavy-fermion superconductor CeCoIn5 -: art. no. 057002
复制标题
DOI：
10.1103/physrevlett.87.057002
复制
发表时间：
2001-07-30
影响因子：
8.6
通讯作者：
Onuki, Y
中科院分区：
文献类型：
--
作者：
Izawa, K;Yamaguchi, H;Onuki, Y
研究了重费米子超导体CeCoIn 5在二维平面内旋转磁场中的热导率。一个明确的四重对称性的热导率，这是一个超导带隙的特点与节点沿着（+/-π，+/-π）方向被解决。热导率测量还揭示了在H-c2处的一级跃迁，表明泡利限制超导状态。这些结果表明，对称性很可能属于d（x2-y2），这意味着各向异性反铁磁涨落与超导电性有关。
The thermal conductivity of the heavy-fermion superconductor CeCoIn5 has been studied in a magnetic field rotating within the 2D planes. A clear fourfold symmetry of the thermal conductivity which is characteristic of a superconducting gap with nodes along the (+/- pi, +/- pi) directions is resolved. The thermal conductivity measurement also reveals a first-order transition at H-c2, indicating a Pauli limited superconducting state. These results indicate that the symmetry most likely belongs to d(x2-y2), implying that the anisotropic antiferromagnetic fluctuation is relevant to the superconductivity.