Intrinsic and adsorbate-modified vibrations of the copper (110) surface

A. P. Baddorf; J. M. Mundenar; E. W. Plummer

doi:10.1016/0368-2048(86)85092-7

Intrinsic and adsorbate-modified vibrations of the copper (110) surface

A. P. Baddorf, J. M. Mundenar, E. W. Plummer

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Abstract

High resolution electron energy loss spectroscopy (HREELS) has been used to study a surface phonon of a clean and adsorbate covered Cu(110) surface. The clean surface phonon has an energy of 20 meV with an intrinsic width of 2.4 ± 1.5 meV FWHM. Some ordered adsorbates enhanced the phonon intensity and shifted the phonon energy. A c(2×2) sulfur overlayer lowers the phonon energy to 18 meV. Upon oxygen exposure, the phonon energy varies continuously from 20 to 29 meV as the p(2×1) and ultimately the c(6×2) reconstruction occur. This shift causes the phonon energy to pass through two regions of the high bulk phonon density of states during which no loss of intensity or linewidth broadening is observed. The phonon is quenched for the disordered adsorbates studied here. In addition, an ordered (1×2) reconstruction caused by hydrogen adsorption quenches the phonon.

Original language	English
Pages (from-to)	219-228
Number of pages	10
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	38
Issue number	C
DOIs	https://doi.org/10.1016/0368-2048(86)85092-7
State	Published - 1986
Externally published	Yes

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title = "Intrinsic and adsorbate-modified vibrations of the copper (110) surface",

abstract = "High resolution electron energy loss spectroscopy (HREELS) has been used to study a surface phonon of a clean and adsorbate covered Cu(110) surface. The clean surface phonon has an energy of 20 meV with an intrinsic width of 2.4 ± 1.5 meV FWHM. Some ordered adsorbates enhanced the phonon intensity and shifted the phonon energy. A c(2×2) sulfur overlayer lowers the phonon energy to 18 meV. Upon oxygen exposure, the phonon energy varies continuously from 20 to 29 meV as the p(2×1) and ultimately the c(6×2) reconstruction occur. This shift causes the phonon energy to pass through two regions of the high bulk phonon density of states during which no loss of intensity or linewidth broadening is observed. The phonon is quenched for the disordered adsorbates studied here. In addition, an ordered (1×2) reconstruction caused by hydrogen adsorption quenches the phonon.",

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TY - JOUR

T1 - Intrinsic and adsorbate-modified vibrations of the copper (110) surface

AU - Baddorf, A. P.

AU - Mundenar, J. M.

AU - Plummer, E. W.

PY - 1986

Y1 - 1986

N2 - High resolution electron energy loss spectroscopy (HREELS) has been used to study a surface phonon of a clean and adsorbate covered Cu(110) surface. The clean surface phonon has an energy of 20 meV with an intrinsic width of 2.4 ± 1.5 meV FWHM. Some ordered adsorbates enhanced the phonon intensity and shifted the phonon energy. A c(2×2) sulfur overlayer lowers the phonon energy to 18 meV. Upon oxygen exposure, the phonon energy varies continuously from 20 to 29 meV as the p(2×1) and ultimately the c(6×2) reconstruction occur. This shift causes the phonon energy to pass through two regions of the high bulk phonon density of states during which no loss of intensity or linewidth broadening is observed. The phonon is quenched for the disordered adsorbates studied here. In addition, an ordered (1×2) reconstruction caused by hydrogen adsorption quenches the phonon.

AB - High resolution electron energy loss spectroscopy (HREELS) has been used to study a surface phonon of a clean and adsorbate covered Cu(110) surface. The clean surface phonon has an energy of 20 meV with an intrinsic width of 2.4 ± 1.5 meV FWHM. Some ordered adsorbates enhanced the phonon intensity and shifted the phonon energy. A c(2×2) sulfur overlayer lowers the phonon energy to 18 meV. Upon oxygen exposure, the phonon energy varies continuously from 20 to 29 meV as the p(2×1) and ultimately the c(6×2) reconstruction occur. This shift causes the phonon energy to pass through two regions of the high bulk phonon density of states during which no loss of intensity or linewidth broadening is observed. The phonon is quenched for the disordered adsorbates studied here. In addition, an ordered (1×2) reconstruction caused by hydrogen adsorption quenches the phonon.

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U2 - 10.1016/0368-2048(86)85092-7

DO - 10.1016/0368-2048(86)85092-7

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SN - 0368-2048

VL - 38

SP - 219

EP - 228

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

IS - C

ER -

Intrinsic and adsorbate-modified vibrations of the copper (110) surface

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