Electronic structures of ferromagnetic superconductors UGe2 and UCoGe studied by angle-resolved photoelectron spectroscopy
Electronic structures of ferromagnetic superconductors UGe2 and UCoGe studied by angle-resolved photoelectron spectroscopy
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用角分辨光电子能谱研究铁磁超导体 UGe2 和 UCoGe 的电子结构
DOI：
10.1103/physrevb.91.174503
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and Y. Onuki
中科院分区：
文献类型：
--
作者：
S. Fujimori;T. Ohkochi;I. Kawasaki;A. Yasui;Y. Takeda;T. Okane;Y. Saitoh;A. Fujimori;H. Yamagami;Y. Haga;E. Yamamoto;and Y. Onuki
利用软X射线角分辨光电子能谱研究了铁磁超导体和顺磁相的电子结构。在附近观察到态贡献较大的准粒子带，表明这些化合物的电子具有巡游特征。将所有电子视为巡游电子进行能带结构计算，解释了它们的整体能带结构。同时，附近的态与能带结构的计算结果有较大的偏差，表明这些化合物的费米面形状与计算结果有本质的不同，这可能是由于低对称性晶体复杂能带结构中的电子关联效应造成的.共振光电子能谱实验发现，在~中态之间存在强杂化，表明态对磁性、输运和超导性质的贡献有限。
The electronic structures of the ferromagnetic superconductorsandin the paramagnetic phase were studied by angle-resolved photoelectron spectroscopy using soft x rays. The quasiparticle bands with large contributions fromstates were observed in the vicinity of, suggesting that theelectrons of these compounds have an itinerant character. Their overall band structures were explained by the band-structure calculations treating all theelectrons as being itinerant. Meanwhile, the states in the vicinity ofshow considerable deviations from the results of band-structure calculations, suggesting that the shapes of Fermi surface of these compounds are qualitatively different from the calculations, possibly caused by electron correlation effect in the complicated band structures of the low-symmetry crystals. Strong hybridization betweenandstates inwere found by theresonant photoemission experiment, suggesting thatstates have finite contributions to the magnetic, transport, and superconducting properties.