论文标题
uru2si2中的电子诺动态性重新审视
Electronic nematicity in URu2Si2 revisited
论文作者
论文摘要
URU2SI2中隐藏订单（HO）状态的性质仍然是重毛皮物理学中的主要未解决问题之一。最近，扭矩磁力测定法，X射线衍射和弹性性数据表明，THO = 17.5 K时的HO相变是由电子列效应驱动的。在这里，我们使用各向异性热扩张，Youngś模量，弹性见名和特定的热测量来搜索这种声称的结构不稳定性的热力学特征。与已发表的结果相反，我们没有发现任何数据中旋转对称性破坏的证据。有趣的是，我们与已发表的结果完全吻合的弹性渗透性测量结果表现出curie-weiss Divergence，但是我们将其归因于一个体积，而不归因于对称性的效果。最后，在我们的热容量数据中观察到了热波动的明确证据，我们可以从中估算HO相关长度。
The nature of the hidden-order (HO) state in URu2Si2 remains one of the major unsolved issues in heavy-fermion physics. Recently, torque magnetometry, x-ray diffraction and elastoresistivity data have suggested that the HO phase transition at THO = 17.5 K is driven by electronic nematic effects. Here, we search for thermodynamic signatures of this purported structural instability using anisotropic thermal-expansion, Youngś modulus, elastoresistivity and specific-heat measurements. In contrast to the published results, we find no evidence of a rotational symmetry-breaking in any of our data. Interestingly, our elastoresistivity measurements, which are in full agreement with published results, exhibit a Curie-Weiss divergence, which we however attribute to a volume and not to a symmetry-breaking effect. Finally, clear evidence for thermal fluctuations is observed in our heat-capacity data, from which we estimate the HO correlation length.
