Details
| Original language | English |
|---|---|
| Pages (from-to) | 134-146 |
| Number of pages | 13 |
| Journal | Surface Science |
| Volume | 457 |
| Issue number | 1 |
| Publication status | Published - 31 May 2000 |
Abstract
The local geometries of Li adsorbed on the furrowed (211) surface of Mo have been investigated by a LEED-IV analysis using an energy of 30-180 eV. Adsorbate-induced lateral interactions mediated mainly through the substrate turn out to be mainly responsible for the formation of the low-coverage and Li(1 × 4) and Li(1 × 2) chain systems, which have been investigated quantitatively. While the adsorbate-induced vertical relaxations in the substrate have been found to remain small, the lateral relaxations reach values up to 0.15 angstrom. Especially for the Li(1 × 4) structure, these relaxations are correlated, forming wave-like regions of lateral compression and dilatation. They seem to be the consequence of adsorbate-induced Friedel oscillations of the electron density of the substrate, which screen the charge of the adatoms along the [1̄11]-channel direction of Mo(211). Furthermore, as concluded from the bond lengths determined by IV-LEED, the Li-metal bond is much less ionic than that predicted by the Langmuir-Gurney model of chemisorption.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface Science, Vol. 457, No. 1, 31.05.2000, p. 134-146.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Geometrical implications of lateral interactions in chain systems
T2 - Li(1 × 2) and Li(1 × 4) on molybdenum (211)
AU - Kolthoff, D.
AU - Pfnür, Herbert
N1 - Funding information: This work was supported by the Deutsche Forschungsgemeinschaft and by the Volkswagen Stiftung. The collaboration with A. Fedorus and V. Koval is gratefully acknowledged.
PY - 2000/5/31
Y1 - 2000/5/31
N2 - The local geometries of Li adsorbed on the furrowed (211) surface of Mo have been investigated by a LEED-IV analysis using an energy of 30-180 eV. Adsorbate-induced lateral interactions mediated mainly through the substrate turn out to be mainly responsible for the formation of the low-coverage and Li(1 × 4) and Li(1 × 2) chain systems, which have been investigated quantitatively. While the adsorbate-induced vertical relaxations in the substrate have been found to remain small, the lateral relaxations reach values up to 0.15 angstrom. Especially for the Li(1 × 4) structure, these relaxations are correlated, forming wave-like regions of lateral compression and dilatation. They seem to be the consequence of adsorbate-induced Friedel oscillations of the electron density of the substrate, which screen the charge of the adatoms along the [1̄11]-channel direction of Mo(211). Furthermore, as concluded from the bond lengths determined by IV-LEED, the Li-metal bond is much less ionic than that predicted by the Langmuir-Gurney model of chemisorption.
AB - The local geometries of Li adsorbed on the furrowed (211) surface of Mo have been investigated by a LEED-IV analysis using an energy of 30-180 eV. Adsorbate-induced lateral interactions mediated mainly through the substrate turn out to be mainly responsible for the formation of the low-coverage and Li(1 × 4) and Li(1 × 2) chain systems, which have been investigated quantitatively. While the adsorbate-induced vertical relaxations in the substrate have been found to remain small, the lateral relaxations reach values up to 0.15 angstrom. Especially for the Li(1 × 4) structure, these relaxations are correlated, forming wave-like regions of lateral compression and dilatation. They seem to be the consequence of adsorbate-induced Friedel oscillations of the electron density of the substrate, which screen the charge of the adatoms along the [1̄11]-channel direction of Mo(211). Furthermore, as concluded from the bond lengths determined by IV-LEED, the Li-metal bond is much less ionic than that predicted by the Langmuir-Gurney model of chemisorption.
UR - http://www.scopus.com/inward/record.url?scp=0343454043&partnerID=8YFLogxK
U2 - 10.1016/S0039-6028(00)00350-2
DO - 10.1016/S0039-6028(00)00350-2
M3 - Article
AN - SCOPUS:0343454043
VL - 457
SP - 134
EP - 146
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1
ER -