Investigation of adsorbates with low energy electron diffraction at very low energies (VLEED)

H. Pfnür; M. Lindroos; D. Menzel

doi:10.1016/0039-6028(91)90055-W

Investigation of adsorbates with low energy electron diffraction at very low energies (VLEED)

H. Pfnür
, M. Lindroos
, D. Menzel

Chair of Experimental Physics

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

A systematic test of the properties of LEED in the energy range below 40 eV and its geometrical sensitivity for the case of light adsorbates was carried out using the p(2 × 2) and p(2 × 1) ordered phases of oxygen on Ru(001) as test systems. After modelling the surface barrier by a two-step function calculated IV-curves of the (00)-beam fit the experimental data reasonably well with the optimal geometries obtained by full LEED IV analyses previously. The site sensitivity to light adsorbates like O was found comparable to conventional LEED, although only an integral-order beam was used for the analysis. Multiple scattering contributions for inter- and intra-layer scattering between adsorbate and substrate and within the adsorbed layer were found to be small above 8 eV and incidence angles up to 45° so that VLEED can also be used to analyze disordered lattice gases.

Original language	English
Pages (from-to)	1-10
Number of pages	10
Journal	Surface Science
Volume	248
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(91)90055-W
State	Published - 3 May 1991

Access to Document

10.1016/0039-6028(91)90055-W

Cite this

@article{4fde73f75de74e1da8c4a54396b04ddb,

title = "Investigation of adsorbates with low energy electron diffraction at very low energies (VLEED)",

abstract = "A systematic test of the properties of LEED in the energy range below 40 eV and its geometrical sensitivity for the case of light adsorbates was carried out using the p(2 × 2) and p(2 × 1) ordered phases of oxygen on Ru(001) as test systems. After modelling the surface barrier by a two-step function calculated IV-curves of the (00)-beam fit the experimental data reasonably well with the optimal geometries obtained by full LEED IV analyses previously. The site sensitivity to light adsorbates like O was found comparable to conventional LEED, although only an integral-order beam was used for the analysis. Multiple scattering contributions for inter- and intra-layer scattering between adsorbate and substrate and within the adsorbed layer were found to be small above 8 eV and incidence angles up to 45° so that VLEED can also be used to analyze disordered lattice gases.",

author = "H. Pfn{\"u}r and M. Lindroos and D. Menzel",

note = "Funding Information: This work was supported by the Deutsche For-schungsgemeinschaft through SFB 128 and 338.",

year = "1991",

month = may,

day = "3",

doi = "10.1016/0039-6028(91)90055-W",

language = "English",

volume = "248",

pages = "1--10",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Investigation of adsorbates with low energy electron diffraction at very low energies (VLEED)

AU - Pfnür, H.

AU - Lindroos, M.

AU - Menzel, D.

N1 - Funding Information: This work was supported by the Deutsche For-schungsgemeinschaft through SFB 128 and 338.

PY - 1991/5/3

Y1 - 1991/5/3

N2 - A systematic test of the properties of LEED in the energy range below 40 eV and its geometrical sensitivity for the case of light adsorbates was carried out using the p(2 × 2) and p(2 × 1) ordered phases of oxygen on Ru(001) as test systems. After modelling the surface barrier by a two-step function calculated IV-curves of the (00)-beam fit the experimental data reasonably well with the optimal geometries obtained by full LEED IV analyses previously. The site sensitivity to light adsorbates like O was found comparable to conventional LEED, although only an integral-order beam was used for the analysis. Multiple scattering contributions for inter- and intra-layer scattering between adsorbate and substrate and within the adsorbed layer were found to be small above 8 eV and incidence angles up to 45° so that VLEED can also be used to analyze disordered lattice gases.

AB - A systematic test of the properties of LEED in the energy range below 40 eV and its geometrical sensitivity for the case of light adsorbates was carried out using the p(2 × 2) and p(2 × 1) ordered phases of oxygen on Ru(001) as test systems. After modelling the surface barrier by a two-step function calculated IV-curves of the (00)-beam fit the experimental data reasonably well with the optimal geometries obtained by full LEED IV analyses previously. The site sensitivity to light adsorbates like O was found comparable to conventional LEED, although only an integral-order beam was used for the analysis. Multiple scattering contributions for inter- and intra-layer scattering between adsorbate and substrate and within the adsorbed layer were found to be small above 8 eV and incidence angles up to 45° so that VLEED can also be used to analyze disordered lattice gases.

UR - https://www.scopus.com/pages/publications/0026415098

U2 - 10.1016/0039-6028(91)90055-W

DO - 10.1016/0039-6028(91)90055-W

M3 - Article

AN - SCOPUS:0026415098

SN - 0039-6028

VL - 248

SP - 1

EP - 10

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

Investigation of adsorbates with low energy electron diffraction at very low energies (VLEED)

Abstract

Access to Document

Other files and links

Fingerprint

Cite this