Well-shielded cerium atoms: Electronic structure of adsorbed Ce @ C_(82) on Si surfaces

K. Schulte; L. Wang; P. J. Moriarty; J. Purton; S. Patel; H. Shinohara; M. Kanai; T. J. S. Dennis

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Well-shielded cerium atoms: Electronic structure of adsorbed Ce @ C_(82) on Si surfaces

机译：屏蔽良好的铈原子：Si表面上吸附的Ce @ C_（82）的电子结构

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The interaction of Ce@C_(82) with clean and silver-terminated Si(111) surfaces has been studied with synchrotron-radiation photoemission spectroscopy and near-edge x-ray absorption fine-structure (NEXAFS) spectroscopy. Use of an Ag/Si(111)-(3~(1/2) x 3~(1/2))R30° surface as an initial substrate enables the molecule-substrate interaction to be progressively strengthened through controlled annealing. Although strong covalent bonding and distortion of the fullerene cage are observed following the removal of the Ag-induced reconstruction (above 550℃), the cerium atom's valence and overall electronic structure, as probed by Ce 3d NEXAFS, appear to be remarkably unaffected.

机译：Ce @ C_（82）与干净和银封端的Si（111）表面之间的相互作用已通过同步辐射辐射光发射光谱法和近边缘X射线吸收精细结构（NEXAFS）光谱进行了研究。通过使用Ag / Si（111）-（3〜（1/2）x 3〜（1/2））R30°表面作为初始衬底，可以通过受控退火逐步增强分子与衬底之间的相互作用。尽管在去除银诱导的重建后（550℃以上）观察到富勒烯笼的强共价键结合和变形，但是Ce 3d NEXAFS探测到的铈原子的化合价和整体电子结构似乎并未受到明显影响。

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来源
《Physical review. B, Condensed Matter And Materals Physics》 |2005年第11期|p.115437.1-115437.6|共6页
作者
K. Schulte; L. Wang; P. J. Moriarty; J. Purton; S. Patel; H. Shinohara; M. Kanai; T. J. S. Dennis;
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School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom;

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正文语种 eng
中图分类固体物理学;
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fullerenes and related materials; intercalation compounds; photoelectron spectra; rare earth metals and alloys;

机译：富勒烯及相关材料;插层化合物;光电子能谱;稀土金属和合金;

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Well-shielded cerium atoms: Electronic structure of adsorbed Ce @ C_(82) on Si surfaces

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