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Investigation of a two-dimensional dysprosium germanide on Ge(111): A medium-energy ion-scattering study including direct observation of a reversal of top-layer buckling upon adsorption of hydrogen

Spence, D., Noakes, T., Bailey, Paul and Tear, S. (2000) Investigation of a two-dimensional dysprosium germanide on Ge(111): A medium-energy ion-scattering study including direct observation of a reversal of top-layer buckling upon adsorption of hydrogen. Physical Review B, 62 (8). pp. 5016-5020. ISSN 0163-1829

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Abstract

A two-dimensional dysprosium germanide of stoichiometry DyGe2 on the Ge(111) surface, with a nominal Dy coverage of one monolayer, has been investigated using medium-energy ion scattering. A quantitative structural analysis has revealed that the Dy atoms reside beneath a well-ordered Ge(111) bilayer, rotated by 180° with respect to the bulk. Upon adsorption of hydrogen, the buckling of the top layer was seen to reverse with a corresponding expansion of the Dy-Ge bond length. Possible generalizations for other rare earth/semiconductor systems are discussed.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Schools: School of Applied Sciences
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Depositing User: Sharon Beastall
Date Deposited: 06 Sep 2012 12:45
Last Modified: 06 Sep 2012 12:45
URI: http://eprints.hud.ac.uk/id/eprint/14741

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