Helicity order: hidden order parameter in URu2Si2.
Helicity order: hidden order parameter in URu2Si2.
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螺旋度阶数：URu2Si2 中隐藏的阶数参数。
DOI：
10.1103/physrevlett.96.036405
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发表时间：
2005
影响因子：
8.6
通讯作者：
Lijun Zhu
中科院分区：
文献类型：
--
作者：
C. Varma;Lijun Zhu
我们建议，“隐藏序参数”在URu 2Si 2是螺旋度秩序，必须出现的，如果Pomeranchuk标准的自旋反对称朗道参数相对于费米液体状态的稳定性被违反。在一个简单的模型中，我们计算了比热，线性和非线性磁磁化率，以及在磁场中的转变温度的变化与这样的序参量，并获得定量的协议与实验中的两个参数提取的数据。NMR谱线宽度的特殊温度依赖性和中子散射所看到的有序相的激发损失的性质也得到了解释，并建议实验直接确认所提出的序参量。
We propose that the "hidden order parameter" in URu2Si2 is a helicity order that must arise if the Pomeranchuk criteria for the spin-antisymmetric Landau parameters with respect to the stability of a Fermi liquid state are violated. In a simple model, we calculate the specific heat, the linear and nonlinear magnetic susceptibilities, and the change of transition temperature in a magnetic field with such an order parameter, and obtain quantitative agreement with experiments in terms of two parameters extracted from the data. The peculiar temperature dependence of the NMR linewidth and the nature of the loss of excitations in the ordered phase seen by neutron scattering are also explained, and experiments are suggested to directly confirm the proposed order parameter.