Thermal conductivity in near-nodal superconductors
Thermal conductivity in near-nodal superconductors
复制标题
近节点超导体的热导率
DOI：
10.1088/0256-307x/35/12/127402
复制
发表时间：
2018
影响因子：
3.5
通讯作者：
Wang Qiang-Hua
中科院分区：
文献类型：
--
作者：
Meng Hui;Zhang Huan;Wang Wan-Sheng;Wang Qiang-Hua
低温下普遍存在的热导率行为通常被认为是超导体中能隙节点的特征。在这里，我们表明，在近节超导体的热导率服从两个参数的标度律，并可以开发超普遍的行为，如果温度约为一半的差距最小值。然而，当温度固定在约四分之一的差距最小值，热导率可以开发一个下降与散射率，这是在良好的协议与实验的行为在Sr2RuO4的热导率。我们的理论对于正确分析任何近节超导体的热导率都是有用的。
The universal behavior of thermal conductivity at low temperatures is usually taken as the signature of gap nodes in superconductors. Here we show that in near-nodal superconductors the thermal conductivity obeys a two-parameter scaling law, and can develop super-universal behavior if the temperature is about half the gap minimum. However, when the temperature is fixed at about one quarter of the gap minimum, the thermal conductivity can develop a dip versus the scattering rate, which is in excellent agreement with the behavior of the experimental thermal conductivity in Sr2RuO4. Our theory is useful to correctly analyze the thermal conductivity in any near-nodal superconductor.