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用紫外光电子能谱和同步辐射光电子能谱研究了Sm掺杂C60薄膜的价带电子结构.Sm的价电子大部分转移给C60，化学键以离子性为主.对于任何化学配比都没有观察到费米边，所以Sm富勒烯超导相在室温下为半导体性质.获得了很接近单相Sm2.75C60的样品在费米能级附近的电子态密度分布.固溶相的光电子发射与Sm2.75C60有明显区别.SmxC60
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关键词:
- C60的Sm填隙化合物 /
- 价带光电子能谱 /
- 电子结构
Valence band structure of Sm-intercalated C60 thin films is researched with ultraviolet photoelectron spectroscopy and synchrotron-radiation photoemission spectroscopy. Most valence electrons of Sm transfer to C60，and the bonding nature is mainly ionic. No Fermi edge is observed for all stoichiometries. Thus the superconducting Sm fulleride has semiconducting property at room temperature. Density of states near the Fermi level is obtained for single phase of Sm2.75C60. Photoemission of the solid solution phase differs apparently from that of Sm2.75C60. SmxC60 (2.752.75C60 and Sm6C60, which indicates that another phase exists or Sm doping proceeds smoothly through the LUMO+1 band. The interfaces between different phases are unstable above 130 ℃.计量
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- 被引次数: 0
物理学报. 2006, 55(8): 4265-4270.
doi: 10.7498/aps.55.4265.
Sm富勒烯的价带光电子能谱
- 收稿日期: 2005-10-24
- 修回日期: 2006-03-27
- 刊出日期: 2006-04-05
摘要: 用紫外光电子能谱和同步辐射光电子能谱研究了Sm掺杂C60薄膜的价带电子结构.Sm的价电子大部分转移给C60，化学键以离子性为主.对于任何化学配比都没有观察到费米边，所以Sm富勒烯超导相在室温下为半导体性质.获得了很接近单相Sm2.75C60的样品在费米能级附近的电子态密度分布.固溶相的光电子发射与Sm2.75C60有明显区别.SmxC60
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关键词:
- C60的Sm填隙化合物 /
- 价带光电子能谱 /
- 电子结构
English Abstract
Valence band photoemission of Sm fullerides
- Received Date:
24 October 2005
- Accepted Date:
27 March 2006
- Published Online:
05 April 2006
Abstract: Valence band structure of Sm-intercalated C60 thin films is researched with ultraviolet photoelectron spectroscopy and synchrotron-radiation photoemission spectroscopy. Most valence electrons of Sm transfer to C60，and the bonding nature is mainly ionic. No Fermi edge is observed for all stoichiometries. Thus the superconducting Sm fulleride has semiconducting property at room temperature. Density of states near the Fermi level is obtained for single phase of Sm2.75C60. Photoemission of the solid solution phase differs apparently from that of Sm2.75C60. SmxC60 (2.752.75C60 and Sm6C60, which indicates that another phase exists or Sm doping proceeds smoothly through the LUMO+1 band. The interfaces between different phases are unstable above 130 ℃.
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