摘要
在C6 0 单晶超高真空解理面上制备C6 0 的Rb填隙化合物薄膜 .用同步辐射光电子能谱研究了相衍变过程 .观察到对应于固溶相、Rb1 C6 0 和Rb3C6 0 的电子态密度分布 .当数纳米厚Rb3C6 0 薄膜在C6 0 单晶 (111)解理面形成后 ,室温条件下进一步沉积Rb至样品表面不产生fcc到bct或bcc结构相变 .C6 0 分子的大尺寸提供了表面填隙位置使得样品表面形成Rb4 C6 0 和Rb5C6 0 吸附相 .价带电子能谱结果表明这两种表面相为金属性 .Rb 3d芯态电子能谱测量进一步证实了表面Rb4 C6 0 和Rb5C6 0 吸附相的存在 .
Rb-intercalated C 60 thin film was prepared on the cleaved (111) surface of C 60 single crystal under the ultra-high-vacuum condition. Phase evolution was studied by the synchrotron radiation photoemission technique. The energy distribution curves for the solid solution phase, Rb 1C 60 and Rb 3C 60 phases were observed. After the Rb 3C 60 thin film with a thickness of nanometers has formed on the surface layers of the C 60 single crystal, the excess depositions of Rb do not induce the bulk-like fcc to bct or bcc structure transitions at room temperature. The large size of C 60 molecule offers the surface vacancies for the formations of Rb 4C 60 and Rb 5C 60 adsorption phases that are further verified by Rb 3d core-level photoemission measurements. Valence band photoemission results exhibit that the surface phases are metallic.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第1期248-253,共6页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :10 0 740 5 3 )
浙江省自然科学基金 (批准号 :10 0 0 19)
北京正负电子对撞机同步辐射实验室资助的课题~~
