Multilayer relaxation of the Mg(0001) surface

Document Type

Letter to the Editor

Publication Date



We have Investigated the interplanar relaxation of the clean (0001)-(1 × 1) surface of magnesium at 100 K using a dynamical LEED I-V analysis. In contrast to almost all other metal surfaces, an expansion has been observed for the first interlayer spacing of this clean surface. Using an extended database, the results indicate that the first three interlayer spacings are relaxed from the bulk value by Δd12 = +1.9 ± 0.3%, Δd23 = +0.8 ± 0.4%, and Δd34 = -0.4 ± 0.5%. A comparison of this observed multi relaxation with experimental and theoretical results for similar free-electron closepacked metal surfaces, e.g. Al(111), suggests that a surface expansion is a normal property of high electron density simple metals. © 1993.

Publication Source (Journal or Book title)

Surface Science

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