Reversible phase transformation and doubly-charged anions at the surface of simple cubic RbC60

Autor:	Macovez, Roberto, Goldoni, Andrea, Petaccia, Luca, Marenne, Ingrid, Bruehwiler, Paul A., Rudolf, Petra
Rok vydání:	2008
Předmět:	Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.101.236403
Popis:	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 C602- anions and contributes to the spectral intensity at the Fermi level. Comment: 13 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0810.4818 Zobrazit plný text záznamu View this record from Arxiv