ARPES/STM study of the surface terminations and 5 f -electron character in URu2Si2
ARPES/STM study of the surface terminations and 5 f -electron character in URu2Si2
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URu2Si2 表面终端和 5 f 电子特征的 ARPES/STM 研究
DOI：
10.1103/physrevb.98.115121
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发表时间：
2018
影响因子：
3.7
通讯作者：
Q. Y. Chen
中科院分区：
文献类型：
--
作者：
W. Zhang;H. Y. Lu;D. H. Xie;W. Feng;S. Y. Tan;Y. Liu;X. G. Zhu;Y. Zhang;Q. Q. Hao;Y. B. Huang;X. C. Lai;Q. Y. Chen
隐藏的秩序仍然是一个谜，现在已经进入第四个十年。解决隐藏秩序的本质的重要性激发了广泛的研究。在这里，我们提出了一个详细的表征不同的表面终端在角度分辨光电子能谱，结合扫描隧道光谱和动态平均场理论的计算，可能会揭开这个难题的一块。U-终止表面的特征是由点周围的类电子带，而类孔带的特征是Si-终止表面。我们还研究了电子结构在11 ~ 70 K温度范围内的演化，在相干温度（55 K）附近没有观察到电子结构的突变。随着温度的升高，谱重逐渐减弱，在此温度以上仍有谱重存在。我们的研究结果表明，表面终端在是一个重要的问题，要考虑在未来的工作。
Hidden order inhas remained a mystery that is now entering its fourth decade. The importance of resolving the nature of the hidden order has stimulated extensive research. Here we present a detailed characterization of different surface terminations inby angle-resolved photoemission spectroscopy, in conjunction with scanning tunneling spectroscopy and dynamical mean-field theory calculations that may unveil a piece of this puzzle. The U-terminated surface is characterized by an electronlike band around thepoint, while a holelike band characterizes the Si-terminated surface. We also investigate the temperature evolution of the electronic structure around thepoint from 11 up to 70 K, and do not observe any abrupt change of the electronic structure around the coherence temperature (55 K). Thespectral weight gradually weakens upon increasing temperature; still somespectral weight can be found above this temperature. Our results suggest that surface terminations inare an important issue to be taken into account in future work.