Photoemission from stepped W(110): initial or final state effect?

The electronic structure of the (110)-oriented terraces of stepped W(331) and W(551) is compared to the one of flat W(110) using angle-resolved photoemission. We identify a surface-localized state which develops perpendicular to the steps into a repeated band structure with the periodicity of the st...

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Bibliographic Details
Published in:Physical review letters 2004-10, Vol.93 (14), p.146802-146802, Article 146802
Main Authors: Shikin, A M, Varykhalov, A, Prudnikova, G V, Adamchuk, V K, Gudat, W, Rader, O
Format: Article
Language:English
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Summary:The electronic structure of the (110)-oriented terraces of stepped W(331) and W(551) is compared to the one of flat W(110) using angle-resolved photoemission. We identify a surface-localized state which develops perpendicular to the steps into a repeated band structure with the periodicity of the step superlattices. It is shown that a final-state diffraction process rather than an initial-state superlattice effect is the origin of the observed behavior and why it does not affect the entire band structure.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.93.146802