Open AccessPhase evolution and electronic states ofRb-intercalated C60 single crystals
Author(s) -
Hong-Nian Li
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.248
Subject(s) - materials science , synchrotron radiation , thin film , valence (chemistry) , single crystal , adsorption , nanometre , electronic structure , angle resolved photoemission spectroscopy , phase (matter) , chemical physics , crystallography , condensed matter physics , nanotechnology , chemistry , optics , physics , organic chemistry , composite material
Rb-intercalated C60 thin film was prepared on the cleaved (111) surface of C60 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, Rb1C60 and Rb3C60 phases were observed. After the Rb3C60 thin film with a thickness of nanometers has formed on the surface layers of the C60 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 C60 molecule offers the surface vacancies for the formations of Rb4C60 and Rb5C60 adsorption phases that are further verified by Rb 3d core-level photoemission measurements. Valence band photoemission results exhibit that the surface phases are metallic.