Surface core-level shift and phonon broadening in PbS(100)

Autor:	Ilkka Kartio, K. Laajalehto, M.H Heinonen, Jarkko Leiro
Rok vydání:	1998
Předmět:	Surface (mathematics) Electron mean free path Phonon Mean free path Chemistry Synchrotron radiation Surfaces and Interfaces Photoelectric effect Condensed Matter Physics Surfaces Coatings and Films X-ray photoelectron spectroscopy Materials Chemistry Core level Atomic physics
Zdroj:	Surface Science. :L918-L923
ISSN:	0039-6028
DOI:	10.1016/s0039-6028(98)00479-8
Popis:	In situ cleaved PbS(100) surfaces were studied by means of X-ray photoelectron spectroscopy (XPS) using synchrotron radiation. A significant narrowing of the S 2p, Pb 5d and Pb 4f lines was found at low temperatures, indicating strong dependence of phonon broadening on temperature. The narrowing was found to be strongest for the S 2p surface peak. This phenomenon made it possible to observe, for the first time, a surface core-level shift (SCLS) in the S 2p lines of PbS. No SCLS was observed for the Pb 5d and Pb 4f lines, which is in agreement with Paolucci and Prince, Phys. Rev. B 41 (1990) 3851. Also, the inelastic mean free paths (IMFP's) for the photoelectrons were determined.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d9db5c964bf81799f61a41cd2fe866e4 https://doi.org/10.1016/s0039-6028(98)00479-8 Zobrazit plný text záznamu Full Text from ScienceDirect