Reversible Phase Transformation and Doubly Charged Anions at the Surface of Simple Cubic RbC60
2008 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 101, no 23, 236403- p.Article in journal (Refereed) Published
The simple cubic phase of a RbC60 thin film has been studied using photoelectron spectroscopy. The simple cubic-to-dimer transition is found to be reversible at the film surface. A sharp Fermi edge is observed and a lower limit of 0.5 eV is found for the surface Hubbard U, pointing to a strongly correlated metallic character of thin-film simple cubic RbC60. A molecular charge state is identified in the valence band and core-level photoemission spectra which arises from C-60(2-) anions and contributes to the spectral intensity at the Fermi level.
Place, publisher, year, edition, pages
2008. Vol. 101, no 23, 236403- p.
IdentifiersURN: urn:nbn:se:uu:diva-107005DOI: 10.1103/PhysRevLett.101.236403ISI: 000261431200046OAI: oai:DiVA.org:uu-107005DiVA: diva2:227551