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arXiv 1302.2161cond-mat.supr-concond-mat.str-el
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节结超导体拓扑转变附近的反常热力学幂律

Anomalous thermodynamic power laws near topological transitions in nodal superconductors

B. Mazidian, J. Quintanilla, A. D. Hillier, J. F. Annett

摘要:

非常规超导体最常通过观察低温热力学或输运性质(如比热)的幂律行为来识别。在这里,我们表明,除了通常的点和线节点,一个更广泛的类不同的节点类型可以发生。这些新类型的节点通常在不同类型的间隙节点拓扑之间存在过渡时出现,例如,当点或线节点首次作为某个物理参数的函数出现时。我们确定了与这些新的节点类型相关的反常的、非整数的热力学幂律,并给出了超导体的物理例子,其中包括非中心对称超导体Li $_2$ Pd $_{3-x}$ Pt $_x$ B。

英文摘要:

Unconventional superconductors are most frequently identified by the observation of power-law behaviour on low-temperature thermodynamic or transport properties, such as specific heat. Here we show that, in addition to the usual point and line nodes, a much wider class of different nodal types can occur. These new types of nodes typically occur when there are transitions between different types of gap node topology, for example when point or line nodes first appear as a function of some physical parameter. We identify anomalous, non-integer thermodynamic power laws associated with these new nodal types, and give physical examples of superconductors in which they might be observed experimentally, including the noncentrosymmetric superconductor Li$_2$Pd$_{3-x}$Pt$_x$B.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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