Kerr效应作为铜氧化物旋向性有序的证据--再论
Kerr effect as evidence of gyrotropic order in the cuprates - revisited
摘要：
最近的分析证实了早期的一般论点，克尔响应消失在任何时间反演不变的系统，满足昂萨格关系。因此，在Hosur \textit{et al}，Phys. Rev. B \textbf{87}，115116（2013）中采用的广泛引用的天然旋光性（回转性）和克尔响应之间的关系是不正确的。然而，有越来越清楚的实验证据表明，正如我们的论文中所论证的那样，在铜氧化物中可观察到的克尔信号的出现反映了点群对称性，而不是时间反演对称性破缺。
英文摘要：
Recent analysis has confirmed earlier general arguments that the Kerr response vanishes in any time-reversal invariant system which satisfies the Onsager relations. Thus, the widely cited relation between natural optical activity (gyrotropy) and the Kerr response, employed in Hosur \textit{et al}, Phys. Rev. B \textbf{87}, 115116 (2013), is incorrect. However, there is increasingly clear experimental evidence that, as argued in our paper, the onset of an observable Kerr-signal in the cuprates reflects point-group symmetry rather than time-reversal symmetry breaking.
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