Spectroscopic signatures of time-reversal symmetry breaking superconductivity
Spectroscopic signatures of time-reversal symmetry breaking superconductivity
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DOI：
10.1038/s42005-022-00819-0
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发表时间：
2022-02
影响因子：
5.5
通讯作者：
N. R. Poniatowski;J. Curtis;A. Yacoby;P. Narang
中科院分区：
文献类型：
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作者：
N. R. Poniatowski;J. Curtis;A. Yacoby;P. Narang
对称破缺态（如超导体）的集体模谱为了解序参量的本质提供了关键的见解。在这项工作中，我们研究了两种独特的非常规超导体集体模式，它们自发地打破了时间反转对称性。我们证明了这些模式在各种时间反转对称性破缺超导状态下是相干和欠阻尼的。通过进一步证明这些模式可以使用许多现有的实验技术来检测，我们提出我们的工作可以作为一种“集体模式光谱”的形式来利用，从而大大增加了能够检测非常规超导体中时间反转对称性破断的实验探测器的数量。
The collective mode spectrum of a symmetry-breaking state, such as a superconductor, provides crucial insight into the nature of the order parameter. In this work, we study two collective modes which are unique to unconventional superconductors that spontaneously break time reversal symmetry. We show that these modes are coherent and underdamped for a wide variety of time-reversal symmetry breaking superconducting states. By further demonstrating that these modes can be detected using a number of existing experimental techniques, we propose that our work can be leveraged as a form of “collective mode spectroscopy” that drastically expands the number of experimental probes capable of detecting time-reversal symmetry breaking in unconventional superconductors.