Symmetry of the unoccupied states in Cs graphite intercalation compounds by X-ray absorption

• Published in: Journal of solid state chemistry Vol. 94; no. 1; pp. 79 - 88
• Main Authors: Codazzi, V., Loupias, G., Rabii, S., Elansari, L., Guérard, D., Ascone, I.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 1991; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron states; Exact sciences and technology; Physics; Spin orbit interaction; Fermi level; Brillouin effect; Exchange interaction; Graphite; Angular variation; Cesium; Experimental study; Charge transfer; X ray absorption; Inorganic compound
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/0022-4596(91)90223-5

The X-ray photoabsorption spectra of the first three stages of cesium graphite intercalation compounds have been measured at the L absorption edges of Cs, using a linearly polarized synchrotron beam. The results are interpreted based on the self-consistent field energy band calculation for CsC 8. The L I spectra show strong dependence on the polarization angle of the incident radiation. The structures are well correlated with the p x , p y , and p z final states located on Cs sites. In L II and L III spectra the familiar white lines, characteristic of metals, are observed. These are attributed to transitions to unoccupied states with atomic d character at Cs sites. The results also indicate that the charge transfer between Cs and C layers in CsC 8 is nearly unity.