双色性作为自旋轨道耦合金属宇称破缺相的探针
Dichroism as a probe for parity-breaking phases of spin-orbit coupled metals
摘要：
最近，自旋-轨道耦合金属中自旋-自旋相互作用诱导的旋致有序、铁电有序和多极有序的一般形式被提出。在这里，我指出，所得到的序参量是等同于期望值的运营商，确定自然的圆二向色性信号的光学和X射线吸收。这些运营商的等价物和由此产生的二色性的一些一般性质被提及，我列出了几个材料的例子，在这方面，包括外尔半金属。的烧绿石超导体Cd 2 Re 2 O 7中的张量顺序的特定情况下，更详细地处理，包括计算的X射线吸收和圆二色性在O K边缘。
英文摘要：
Recently, a general formalism was presented for gyrotropic, ferroelectric, and multipolar order in spin-orbit coupled metals induced by spin-spin interactions. Here, I point out that the resulting order parameters are equivalent to expectation values of operators that determine natural circular dichroic signals in optical and x-ray absorption. Some general properties of these operator equivalents and the resulting dichroisms are mentioned, and I list several material examples in this connection, including Weyl semimetals. The particular case of the tensor order in the pyrochlore superconductor Cd2Re2O7 is treated in more detail, including calculations of the x-ray absorption and circular dichroism at the O K edge.
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