摘要
Using photoemission spectroscopy,we have studied the adsorption of Sin on C_(60) film.At tbe first stage of Sm adsorption,the C_(60) valence band shifts to the high binding energy side.The maximum shift is about 0.4 eV.In the meantime,there appears a new structure at the upper side of the highest occupied molecule orbit(HOMO)band,which comes from the hybrid of the Sm 4f^(5) state and C_(60) HOMO band.As Sm coverage increases the Sm electron is in a kind of Sm^(2+) state due to the forming of Sm cluster on the surface.
基金
Supported by the National Natural Science Foundation of China
Younger Scientist Foundation of USTC and Doctoral Training of State Education Commission.
