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- W2080689444 abstract "The surface atomic and electronic structure of ${mathrm{ErSi}}_{1.7}$ layers epitaxially grown on Si(111) is studied by angle-resolved ultraviolet photoemission spectroscopy. The experimental results are compared to electronic band-structure calculations for various reasonable surface atomic configurations. Satisfactory agreement is obtained for two geometries consisting of reconstructed ${mathrm{ErSi}}_{1.7}$ (0001) surfaces. Both reconstructions involve a buckled Si top layer similar to (111) double layers in bulk Si but differ in their registries with respect to the bulk silicide layer underneath, leading to a silicide surface termination with ${mathrm{ErSi}}_{1.7}$ stoichiometry. In contrast, the calculations clearly show that a surface termination with ${mathrm{ErSi}}_{1.7}$ stoichiometry involving an ordered array of vacancies in the buckled Si top layer would result in a quite different surface electronic structure incompatible with the experimental one. This allows us to rule out this model often invoked in previous work. Finally, models exposing a bulklike flat Si graphitelike top layer, with or without vacancies, can also safely be ruled out on the basis of the present data." @default.
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- W2080689444 date "1995-10-15" @default.
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- W2080689444 title "Surface electronic and atomic structure of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>ErSi</mml:mi></mml:mrow><mml:mrow><mml:mn>1.7</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>on Si(111)" @default.
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- W2080689444 doi "https://doi.org/10.1103/physrevb.52.11932" @default.
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