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Calculation of surface core-level shifts within complete screening: Problems with pseudohydrogenated slabs
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Materials Theory.
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2008 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 77, no 24, 245302- p.Article in journal (Refereed) Published
Abstract [en]

By considering GaAs(110) and Si(100)(2x1) surfaces, it is shown that the use of the pseudohydrogen atoms to saturate the dangling bonds at one side of the slab modeling a free surface can lead to distorted surface core-level shifts within the complete screening picture. The effect is linked to the polarization of the slab and to the change in the bulklike electronic structure close to pseudohydrogenated part of the slab. It is demonstrated that these problems can be avoided if the pseudohydrogenated slab is large enough and the bulk reference layer is properly chosen. One easy way to control these errors is to monitor the planar-averaged potential energy curve of the slab.

Place, publisher, year, edition, pages
2008. Vol. 77, no 24, 245302- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-109998DOI: 10.1103/PhysRevB.77.245302ISI: 000257289700061OAI: oai:DiVA.org:uu-109998DiVA: diva2:274997
Available from: 2009-11-02 Created: 2009-11-02 Last updated: 2017-12-12Bibliographically approved

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Vitos, LeventeJohansson, Börje

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