Incommensurate structures and epitaxial growth of Li on Ru(0001): A quantitative low-energy electron-diffraction study

M. Gierer, H. Over, H. Bludau, and G. Ertl
Phys. Rev. B 52, 2927 – Published 15 July 1995
PDFExport Citation

Abstract

The structural properties of Li films on a Ru(0001) surface during initial growth were determined employing the technique of low-energy electron diffraction (LEED). For submonolayer coverages between ΘLi=0.61 and ΘLI=0.78, incommensurate structures oriented along high-symmetry directions of the substrate were observed. Fully dynamical LEED calculations of a (5×5) structure modeling the Li overlayer at ΘLi=0.64 revealed a Li-Ru interlayer spacing of 2.17±0.10 Å. The computational effort for solving this structure could be significantly reduced by using a (5×1) unit mesh instead of the (5×5) unit cell without losing structural information. The first Li layer is completed at a coverage of 0.78. In the multilayer regime, the Ru(0001)-Li system exhibits also long-range order as indicated by adsorbate-induced hexagonal LEED patterns. LEED structure analyses of Li films with thicknesses of two and three layers revealed that the Li film is grown fcc(111)-like on Ru(0001). The interlayer spacings are DLiLi=2.35±0.10 Å and DLiRu=2.35±0.10 Å; the Li hard-sphere radius turns out to be 1.52±0.05 Å, close to the metallic Pauling radius.

  • Received 21 February 1995

DOI:https://doi.org/10.1103/PhysRevB.52.2927

©1995 American Physical Society

Authors & Affiliations

M. Gierer, H. Over, H. Bludau, and G. Ertl

  • Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany

References (Subscription Required)

Click to Expand
Issue

Vol. 52, Iss. 4 — 15 July 1995

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×