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Electronic state of C(60) monolayer on Ag(111) before and after Yb intercalation
Li, HN; Wang, XX; He, SL; Ibrahim, K; Qian, HJ; Su, R; Zhong, J; Abbas, MI; Hong, CH; Kui RX(奎热西); Qian HJ(钱海杰); Su R(苏润); Zhong J(钟俊); Hong CH(洪才浩)
2005
发表期刊SURFACE SCIENCE
卷号586期号:1-3页码:#REF!
通讯作者Li, HN (reprint author), Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China.
文章类型Article
摘要C(60) monolayer was prepared on Ag(l 11) surface in ultra-high vacuum environment. The electronic state was investigated by the synchrotron radiation photoemission technique. The results reveal the remarkable covalent component to the C(60)-Ag bonding, which was not observed in previously reported works. The bonding in the interface is primarily covalent with some ionic contribution. Two covalent bonding features were observed distinctly at similar to 4.1 and similar to 4.7 eV binding energy. These features are ascribed to the hybridization between the next highest occupied molecular orbital (HOMO-1) Of C(60) and the Ag 4d state. The work function of the C(60) monolayer on Ag(l 11) is determined to be 4.63 +/- 0.10 eV that is larger than that of the clean Ag(l 11) surface by 0.13 +/- 0.02 eV. Yb intercalation was carried out to investigate the valence evolution of the monolayer system. The spectral weight at the Fermi level increases substantially at low intercalation stage. After the filling of the lowest unoccupied molecular orbital (LUMO) band, the sample exhibits the semiconducting property for all the rest intercalation levels, and the electronic state departs from the simple band-filling scheme. The electrons may occupy either the hybridizing state or the Madelung-derived state. The above observations are drastically different from that for bulk Yb fullerides, indicating novel properties of rare-earth-metal intercalated C60 monolayer. (c) 2005 Elsevier B.V. All rights reserved.
关键词1 ML C(60)/Ag(111) bonding nature Yb intercalation photoemission
学科领域Chemistry; Physics
DOI10.1016/j.susc.2005.04.053
收录类别SCI
WOS类目Chemistry, Physical ; Physics, Condensed Matter
WOS记录号WOS:000230290700007
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被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225883
专题多学科研究中心
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GB/T 7714
Li, HN,Wang, XX,He, SL,et al. Electronic state of C(60) monolayer on Ag(111) before and after Yb intercalation[J]. SURFACE SCIENCE,2005,586(1-3):#REF!.
APA Li, HN.,Wang, XX.,He, SL.,Ibrahim, K.,Qian, HJ.,...&洪才浩.(2005).Electronic state of C(60) monolayer on Ag(111) before and after Yb intercalation.SURFACE SCIENCE,586(1-3),#REF!.
MLA Li, HN,et al."Electronic state of C(60) monolayer on Ag(111) before and after Yb intercalation".SURFACE SCIENCE 586.1-3(2005):#REF!.
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