Si 2p core-level shifts at the C2H2/Si(001) and C2H4/Si(0011) surfaces

J. H. Cho, L. Kleinman

Research output: Contribution to journalArticle

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Abstract

Two recent x-ray photoemission spectroscopy (XPS) experiments reported very different Si 2p core-level shifts at the C2H2/Si(001)-2×1 [Phys. Rev. B 60, 11 586 (1999)] and C2H4/Si(001)-2×1 [Phys. Rev. B 58, 11 029 (1998)] surfaces. However, our initial- and final-state theory calculations show that both systems give the same behavior in the surface core-level shifts: i.e., the chemical shifts of the clean surface are essentailly canceled by the di-δ bonding between adsorbed molecules and Si dimer atoms. The present results agree well with the XPS data of the C2H4/Si(001)-2×1 surface; but disagree with those of the C2H2/Si(001)-2×1 surface.

Original languageEnglish
Article number193402
Pages (from-to)1934021-1934022
Number of pages2
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number19
StatePublished - 2001 Aug 15

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Core levels
shift
Photoelectron spectroscopy
photoelectric emission
X rays
Chemical shift
Dimers
spectroscopy
chemical equilibrium
x rays
dimers
Atoms
Molecules
atoms
molecules
Experiments

Cite this

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abstract = "Two recent x-ray photoemission spectroscopy (XPS) experiments reported very different Si 2p core-level shifts at the C2H2/Si(001)-2×1 [Phys. Rev. B 60, 11 586 (1999)] and C2H4/Si(001)-2×1 [Phys. Rev. B 58, 11 029 (1998)] surfaces. However, our initial- and final-state theory calculations show that both systems give the same behavior in the surface core-level shifts: i.e., the chemical shifts of the clean surface are essentailly canceled by the di-δ bonding between adsorbed molecules and Si dimer atoms. The present results agree well with the XPS data of the C2H4/Si(001)-2×1 surface; but disagree with those of the C2H2/Si(001)-2×1 surface.",
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Si 2p core-level shifts at the C2H2/Si(001) and C2H4/Si(0011) surfaces. / Cho, J. H.; Kleinman, L.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 63, No. 19, 193402, 15.08.2001, p. 1934021-1934022.

Research output: Contribution to journalArticle

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AU - Cho, J. H.

AU - Kleinman, L.

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Y1 - 2001/8/15

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