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Persistent URL http://purl.org/net/epubs/work/20609
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Record Id 20609
Title 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
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.
Organisation CCLRC , SND , MEIS
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Language English (EN)
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Journal Article Phys Rev B 62 (2000): 5016-5020. doi:10.1103/PhysRevB.62.5016 2000