期刊
NANOTECHNOLOGY
卷 32, 期 42, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6528/ac13e9
关键词
STM; STS; uranium atoms; transition metal surfaces; surface reactions; Kondo effect
资金
- National Key Research and Development Program of China [2017YFA0303104]
- National Science Foundation of China [11974319, 11904335, 11874330]
- SPC-Lab Research Fund [WDZC201901]
- Science Challenge Project [TZ2016004]
- Special Funds of Institute of Materials [TP02201904, TP02201905]
- [JZX7Y201901SY00900107]
This study comparatively investigated the adsorptions, reactions, and electronic properties of individual U atoms on Cu(111), Ag(111), Au(111), and Ru(0001) surfaces for the first time. U atoms exhibited different adsorption behaviors and tendencies to produce surface vacancies on different metal surfaces.
The mysterious properties of individual U atoms on transition metal surfaces play indispensable parts in supplementing our understanding of uranium-transition metal systems, which are important subjects for both nuclear energy applications and fundamental scientific studies. By using scanning tunneling microscopy and density functional theory calculations, the adsorptions, reactions and electronic properties of individual U atoms on Cu(111), Ag(111), Au(111) and Ru(0001) surfaces were comparatively studied for the first time in this work. Upon the deposition of a small amount of U onto Cu(111) or Ag(111) at 8 K, individual U atoms show relatively high activity and can either be adsorbed on intact substrate surfaces or induce various surface vacancies surrounded by clusters of substrate atoms. By contrast, the majority of U atoms tend to dispersedly adsorb on intact surfaces of Au(111) and Ru(0001) rather than producing surface vacancies at the same temperature. In all cases, Kondo resonance manifested as asymmetric dip feature around Fermi energy is only observed in the differential tunneling conductance spectra of single U adatoms on Ag(111).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据