| The evolution of the electronic structure at the Bi/Ag(111) interface studied using photoemission spectroscopy. | |
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MedLine Citation:
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PMID: 23032482 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The growth of Bi on Ag(111) induces different surface structures, including [Formula: see text] surface alloy, Bi-[Formula: see text] overlayer and Bi(110) thin film, as a function of increasing Bi coverage. Here we report the study of electronic states of these structures using core level and valence band photoemission spectroscopy at room temperature. The sp-derived Shockley surface state on Ag(111) is rapidly quenched upon deposition of Bi, due to the strong variation of the in-plane surface potential in the Ag(2)Bi surface alloy. The Bi 4f core levels of the [Formula: see text] alloy and Bi(110) thin film are shifted to lower binding energy by ∼0.6 eV and ∼0.3 eV compared with the Bi bulk value, respectively. Mechanisms inducing the core level shifts are discussed as due to a complex superposition of several factors. As Bi coverage increases and a Bi(110) overlayer forms on Ag(111), a new state is observed at ∼0.9 ML arising from electronic states localized at the Ag-Bi interface. Finally the change of work function as a function of coverage is discussed on the basis of a charge transfer model. |
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Authors:
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K H L Zhang; I M McLeod; M Lahti; K Pussi; V R Dhanak |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-03 |
Journal Detail:
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Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 24 ISSN: 1361-648X ISO Abbreviation: J Phys Condens Matter Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: - |
Other Details:
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Languages: ENG Pagination: 435502 Citation Subset: - |
Affiliation:
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Department of Chemistry, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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