URu2Si2 中隐藏序背后的对称性与关联
强关联电子
2015-01-27 v2
摘要
我们通过在非弹性中子和 X 射线散射测量中绘制晶格和磁激发图谱，实验研究了金属间化合物 URu2Si2 在隐藏序（HO）相中的对称性，测量涵盖了 HO 相和高温顺磁相。在所有温度下，激发均尊重体心四方顺磁相的布里渊区边界，即使在 HO 相中也未显示出空间对称性降低的迹象。磁激发源于杂化能带之间的跃迁并追踪费米面，其特征得到了声子测量的证实。由于存在较大的杂化能标，完整的铀磁矩在 HO 相中依然保持，这与未观察到晶体场分裂态的情况一致。我们的结果与局域序参量模型以及典型密度波的行为不符。我们提出，一个不破坏空间对称性的序参量可以自然地解释这些特征。
引用
@article{arxiv.1212.6238,
title = {Symmetry and correlations underlying Hidden Order in URu2Si2},
author = {Nicholas P. Butch and Michael E. Manley and Jason R. Jeffries and Marc Janoschek and Kevin Huang and M. Brian Maple and Ayman H. Said and Bogdan M. Leu and Jeffrey W. Lynn},
journal= {arXiv preprint arXiv:1212.6238},
year = {2015}
}
备注
16 pages, 13 figures The scope of this work was expanded to include much more magnetic neutron scattering as well as inelastic x-ray scattering. The modes originally identified as soft phonons are magnetic. Many of the figures had their quality reduced in order to fit the arxiv file size limits. Please see the PRB article for higher quality images