As probed by photoemission, the valence band emission spectra of diamond(lll) undergo reversible changes due to cycles of hydrogen adsorption and desorption. We report here carbon Is spectra from diamond(111) as a function of hydrogen exposure-annealing cycles and as a function of photon energy. We find an additional shoulder to lower binding energy in the C Is spectra of the hydrogen-free reconstructed 2 X 2/2 X1 surface and interpret this result as due to a chemical shift (0.95 ±0.1 eV) of the surface atoms. We analyze the data in terms of models for reconstruction and also derive the inelastic scattering length (escape length) of electrons in diamond over the kinetic energy range 25–1000 eV.

Carbon 1 s studies of diamond(111): Surface shifts, hydrogenation, and electron escape lenaths / B.B. Pate, M. Oshima, J.A. Silberman, G. Rossi, I. Lindau, W.E. Spicer. - In: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY. A. VACUUM, SURFACES, AND FILMS. - ISSN 0734-2101. - 2:2(1984), pp. 957-960. [10.1116/1.572490]

Carbon 1 s studies of diamond(111): Surface shifts, hydrogenation, and electron escape lenaths

G. Rossi;
1984

Abstract

As probed by photoemission, the valence band emission spectra of diamond(lll) undergo reversible changes due to cycles of hydrogen adsorption and desorption. We report here carbon Is spectra from diamond(111) as a function of hydrogen exposure-annealing cycles and as a function of photon energy. We find an additional shoulder to lower binding energy in the C Is spectra of the hydrogen-free reconstructed 2 X 2/2 X1 surface and interpret this result as due to a chemical shift (0.95 ±0.1 eV) of the surface atoms. We analyze the data in terms of models for reconstruction and also derive the inelastic scattering length (escape length) of electrons in diamond over the kinetic energy range 25–1000 eV.
Condensed Matter Physics; Surfaces and Interfaces; Surfaces, Coatings and Films
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/554867
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