Band structure and Fermi surface of UPd3 studied by soft x-ray angle-resolved photoemission spectroscopy
Band structure and Fermi surface of UPd3 studied by soft x-ray angle-resolved photoemission spectroscopy
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软X射线角分辨光电子能谱研究UPd3的能带结构和费米面
DOI：
10.1103/physrevb.87.075142
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
kuto Kawasaki
中科院分区：
文献类型：
--
作者：
K. Kudo;M. Takasuga;Y. Okamoto;Z. Hiroi;and M. Nohara;M. Nohara;M. Nohara;M. Nohara;M. Nohara;M. Nohara;野原実;M. Nohara;M. Nohara;M. Nohara;M. Nohara;M. Nohara;M. Nohara;M. Nohara;野原実;M. Nohara;野原実;野原実;M. Nohara;M. Nohara;野原実;kuto Kawasaki
利用软X射线角分辨光电子能谱研究了UPd的能带结构和费米面。我们已经观察到三个U 5衍生带，其带宽非常窄。这些带中的两个出现在0.8 eV附近，并且稍微分开约0.2 eV。在几乎相同的能量下存在两个带可能是由于存在两个不等价的U位点。另一个U 5带出现在1.8eV附近。该带与两个近简并带之间的能量分离符合5-末态多重态模型。在费米能级附近，观察到几个高色散带，它们分别形成以点为中心的类孔费米面和以点为中心的类电子费米面。这些分散的价带定性解释的能带结构计算，假设本地化的5配置。所有这些实验观测结果都符合U 5的定域性质。
Soft x-ray angle-resolved photoemission experiments have been performed to investigate the band structure and Fermi surface of UPd. We have observed three U 5derived bands whose bandwidths are very narrow. Two of these bands appear around 0.8 eV and are slightly separated by about 0.2 eV. The presence of two bands at nearly the same energy might be due to the presence of the two inequivalent U sites. The other U 5band appears around 1.8 eV. The energy separation between this band and the two nearly degenerate bands agrees with the 5-final-state multiplet model. In the vicinity of Fermi level, several highly dispersive bands, which form a holelike Fermi surface centered at thepoint and an electronlike Fermi surface at the K point, were observed. These dispersive valence bands are qualitatively explained by a band structure calculation that assumes a localized 5configuration. All these experimental observations are consistent with the localized U 5nature.