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The Na-adsorbed Ge(0 0 1) surface: Structure and STM image simulations

✍ Scribed by Barbara Czech; Barbara Stankiewicz

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 723 KB
Volume: 254
Category: Article
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2008.01.009

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✦ Synopsis

Sodium adsorbed on the Ge(0 0 1) surface causes reconstruction of the surface with the type of reconstruction depending on the amount of the adsorbate. We present theoretical investigations of the structure and electronic properties of Na-adsorbed Ge(0 0 1) for the coverage of 0.5 monolayer using the combination of two methods: a plane-wave basis method and a local-orbital minimal-basis method. Two possible minimumtotal-energy atomic configurations have been found, namely, the Na/Ge(0 0 1)-p(2 Â1) and Na/Ge(0 0 1)-p(4 Â 1) reconstructions. The surface electronic structure for all calculated configurations occurs to be metallic. Our investigations are completed by a simulation of STM images for the obtained atomic structures.

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The Na-adsorbed Ge(0&#xa0;0&#xa0;1) surface: Structure and STM image simulations

✦ Synopsis

The Na-adsorbed Ge(0 0 1) surface: Structure and STM image simulations