Symmetry of the Excitations in the Hidden Order State of URu2Si2.
Symmetry of the Excitations in the Hidden Order State of URu2Si2.
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URu2Si2 隐藏有序态激发的对称性。
DOI：
10.1103/physrevlett.113.266405
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
D. Aoki
中科院分区：
文献类型：
--
作者：
J. Buhot;M. A. Measson;Y. Gallais;M. Cazayous;A. Sacuto;G. Lapertot;D. Aoki
我们对单晶进行了低温至8℃下的电子拉曼散射，在低至8℃的温度下，在高达10℃的磁场作用下，我们对单晶进行了偏振电子喇曼散射。这两个拉曼信号都是纯对称的。通过比较拉曼尖峰激发和中子共振的行为，我们提供了新的证据，在两个探测器的选择规则的约束下，隐序态破坏了轴上的平移对称性，使得点折叠在一起。这些具有特殊对称性的拉曼特征作为隐序相的特征，对现有的隐序位相理论提出了很大的限制。
We perform polarized electronic Raman scattering onsingle crystals at low temperature down to 8 K in the hidden-order state and under a magnetic field up to 10 T. The hidden-order state is characterized by a sharp excitation at 1.7 meV and a gap in the electronic continuum below 6.8 meV. Both Raman signatures are of puresymmetry. By comparing the behavior of the Raman sharp excitation and the neutron resonance at, we provide new evidence, constrained by selection rules of the two probes, that the hidden-order state breaks the translational symmetry along theaxis such thatandpoints fold on top of each other. The observation of these distinct Raman features with a peculiarsymmetry as a signature of the hidden-order phase places strong constraints on current theories of the hidden-order in.