Anisotropy of magnetothermal conductivity in Sr2RuO4.
Anisotropy of magnetothermal conductivity in Sr2RuO4.
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Sr2RuO4 中磁热导率的各向异性。
DOI：
10.1103/physrevlett.86.2649
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发表时间：
2001
影响因子：
8.6
通讯作者：
Takehiko Ishiguro
中科院分区：
文献类型：
--
作者：
M. Tanatar;Minoru Suzuki;S. Nagai;Zhiqiang Mao;Y. Maeno;Takehiko Ishiguro
报道了Sr2RuO4的面内和面间热导率与温度、磁场强度和取向的关系。在整个实验温度和磁场范围内，我们没有发现平行于导体平面的磁场旋转的热导率存在显著的各向异性，但在上临界场H(C2)附近，H(C2)本身的各向异性起主导作用。这一发现对Sr2RuO4中可能的超导电性模型施加了强烈的约束，并支持存在超导带隙，其节点线与费米面柱垂直。
The dependence of in-plane and interplane thermal conductivities of Sr2RuO4 on temperature, as well as magnetic field strength and orientation, is reported. We found no notable anisotropy in the thermal conductivity for the magnetic field rotation parallel to the conducting plane in the whole range of experimental temperatures and fields, except in the vicinity of the upper critical field H(c2), where the anisotropy of the H(c2) itself plays a dominant role. This finding imposes strong constraints on the possible models of superconductivity in Sr2RuO4 and supports the existence of a superconducting gap with a line of nodes running orthogonal to the Fermi surface cylinder.