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Direct observation of the f–c hybridization in the ordered uranium films on W(110)

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【作者】 陈秋云谭世勇冯卫罗丽珠朱燮刚赖新春

【Author】 Qiuyun Chen;Shiyong Tan;Wei Feng;Lizhu Luo;Xiegang Zhu;Xinchun Lai;Science and Technology on Surface Physics and Chemistry Laboratory;

【通讯作者】 陈秋云;

【机构】 Science and Technology on Surface Physics and Chemistry Laboratory

【摘要】 A key issue in metallic uranium and its related actinide compounds is the character of the f electrons, whether it is localized or itinerant.Here we grew well ordered uranium films on a W(110) substrate.The surface topography was investigated by scanning tunneling microscopy.The Fermi surface and band structure of the grown films were studied by angle-resolved photoemission spectroscopy.Large spectral weight can be observed around the Fermi level, which mainly comes from the f states.Additionally, we provided direct evidence that the f bands hybridize with the conduction bands in the uranium ordered films, which is different from previously reported mechanism of the direct f–f interaction.We propose that the above two mechanisms both exist in this system by manifesting themselves in different momentum spaces.Our results give a comprehensive study of the ordered uranium films and may throw new light on the study of the 5 f-electron character and physical properties of metallic uranium and other related actinide materials.

【Abstract】 A key issue in metallic uranium and its related actinide compounds is the character of the f electrons, whether it is localized or itinerant.Here we grew well ordered uranium films on a W(110) substrate.The surface topography was investigated by scanning tunneling microscopy.The Fermi surface and band structure of the grown films were studied by angle-resolved photoemission spectroscopy.Large spectral weight can be observed around the Fermi level, which mainly comes from the f states.Additionally, we provided direct evidence that the f bands hybridize with the conduction bands in the uranium ordered films, which is different from previously reported mechanism of the direct f–f interaction.We propose that the above two mechanisms both exist in this system by manifesting themselves in different momentum spaces.Our results give a comprehensive study of the ordered uranium films and may throw new light on the study of the 5 f-electron character and physical properties of metallic uranium and other related actinide materials.

【基金】 Project supported by the National Natural Science Foundation of China(Grant No.11874330);Science Challenge Project,China(Grant No.TZ2016004);the National Key Research and Development Program of China(Grant No.2017YFA0303104)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2019年07期
  • 【分类号】TB383.2
  • 【被引频次】1
  • 【下载频次】10
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