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

doi:10.1088/1674-1056/28/7/077404

中国物理B ›› 2019, Vol. 28 ›› Issue (7): 77404-077404.doi: 10.1088/1674-1056/28/7/077404

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

Qiuyun Chen(陈秋云), Shiyong Tan(谭世勇), Wei Feng(冯卫), Lizhu Luo(罗丽珠), Xiegang Zhu(朱燮刚), Xinchun Lai(赖新春)

Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China

收稿日期:2019-04-26 修回日期:2019-05-30 出版日期:2019-07-05 发布日期:2019-07-05
通讯作者: Qiuyun Chen E-mail:sheqiuyun@126.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11874330), Science Challenge Project, China (Grant No. TZ2016004), and the National Key Research and Development Program of China (Grant No. 2017YFA0303104).

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

Qiuyun Chen(陈秋云), Shiyong Tan(谭世勇), Wei Feng(冯卫), Lizhu Luo(罗丽珠), Xiegang Zhu(朱燮刚), Xinchun Lai(赖新春)

Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China

Received:2019-04-26 Revised:2019-05-30 Online:2019-07-05 Published:2019-07-05
Contact: Qiuyun Chen E-mail:sheqiuyun@126.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11874330), Science Challenge Project, China (Grant No. TZ2016004), and the National Key Research and Development Program of China (Grant No. 2017YFA0303104).

摘要/Abstract

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 5f-electron character and physical properties of metallic uranium and other related actinide materials.

关键词: uranium films, 5f-electron character, angle-resolved photoemission spectroscopy

Abstract:

Key words: uranium films, 5f-electron character, angle-resolved photoemission spectroscopy

中图分类号: (Electronic structure (photoemission, etc.))

74.25.Jb

68.55.-a (Thin film structure and morphology) 07.79.-v (Scanning probe microscopes and components)

陈秋云, 谭世勇, 冯卫, 罗丽珠, 朱燮刚, 赖新春. Direct observation of the f-c hybridization in the ordered uranium films on W(110)[J]. 中国物理B, 2019, 28(7): 77404-077404.

Qiuyun Chen(陈秋云), Shiyong Tan(谭世勇), Wei Feng(冯卫), Lizhu Luo(罗丽珠), Xiegang Zhu(朱燮刚), Xinchun Lai(赖新春). Direct observation of the f-c hybridization in the ordered uranium films on W(110)[J]. Chin. Phys. B, 2019, 28(7): 77404-077404.

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

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

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