Optical Properties of C60 and M6C60 (M=K, Rb, Cs) films

Autor:	M. Holden, G. T. Hager, P. C. Eklund, F. Ni, Ying Wang, Apparao M. Rao, S. L. Ren, W. T. Lee
Rok vydání:	1992
Předmět:	Reflection (mathematics) Materials science X-ray photoelectron spectroscopy Ellipsometry Analytical chemistry Variable angle Thin film Electronic band structure Absorption (electromagnetic radiation) Spectroscopy
Zdroj:	MRS Proceedings. 247
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-247-367
Popis:	We report the optical properties of C60 determined from the variable angle ellipsometry and near normal incidence reflection / transmission (R.T) experiments, and of M6C60 from the R, T experiments. The measurements were performed on thin films (d∼1000 Å) of C60 and M6C60 deposited on both Si(100) and suprasil substrates. The onset for strong absorption across the HOMO-LUMO gap in CgQ is measured to be -2.3 eV, slightly larger than the gap values obtained from the x-ray photoelectron spectroscopy (XPS) and electron-energy-loss spectroscopy (EELS) experiments. The observed peak positions in ε2(ω) for M6C60 and C60 compares well with the recent band structure calculations and suggests that the M6C60 compounds exhibit only a weak hybridization between the C60 and M states.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b412a6b29e59270ad9c4f3235855b89f https://doi.org/10.1557/proc-247-367 Zobrazit plný text záznamu Full text from SpringerLink