Zeeman磁场对有节点非常规超导体节点结构的影响（英文）

发布时间：2018-04-17 17:46

  本文选题：超导 + 节点结构　； 参考：《中国科学院大学学报》2017年03期

【摘要】：在大部分非常规超导体中,准粒子激发谱中存在着"线节点"或"点节点"。这些节点的存在,导致热力学量和输运系数在低温区的温度变化呈现幂次律。解析分析表明,外加的弱Zeeman磁场会显著影响节点的结构。尤其是,预言在某些情况下Zeeman磁场可能在费米面上诱导出"面节点"。计算若干自旋单态和自旋三重态的电子比热,结果显示外加的弱Zeeman磁场对节点结构的影响会导致幂次律产生巨大变化。
[Abstract]:In most unconventional superconductors, there are "line nodes" or "point nodes" in the quasiparticle excitation spectra.The existence of these nodes leads to a power law for the temperature variation of thermodynamic quantities and transport coefficients in the low temperature region.Analytical analysis shows that the addition of weak Zeeman magnetic field will significantly affect the structure of the node.In particular, it is predicted that in some cases the Zeeman magnetic field may induce "plane nodes" on the Fermi surface.The electron specific heat of some spin single states and spin triplet states is calculated. The results show that the influence of the external weak Zeeman magnetic field on the structure of the nodes will result in a great change of the power law.
【作者单位】： 中国科学院大学物理科学学院;
【基金】：Supported by Science Research Fund of UCAS(Y25102BN00)
【分类号】：TM26
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本文编号：1764646