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Segregation at the PdAg(111) surface: Electronic structure calculations
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.ORCID iD: 0000-0003-2832-3293
2005 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 71, no 4Article in journal (Refereed) Published
Abstract [en]

An efficient procedure to calculate surface segregation profiles of substitutionally disordered binary alloys is presented. We show that a simple thermodynamic model with realistic atomic configurations at the surface region combined with the total energies obtained from exact muffin-tin orbitals calculations leads to accurate surface segregation profiles. We find that the calculated surface segregation energies in random alloys show significant dependence on the local environment of the atoms involved in the segregation process. Correspondingly, the alloy surface energy is significantly affected by the subsurface atomic layers. As an example the PdAg(111) surface is considered.

Place, publisher, year, edition, pages
2005. Vol. 71, no 4
Keyword [en]
transition-metal alloys, coherent-potential approximation, cu-ni, pd, hydrogen, energy
URN: urn:nbn:se:kth:diva-14495DOI: 10.1103/PhysRevB.71.045411ISI: 000226736200118ScopusID: 2-s2.0-15744388297OAI: diva2:332536
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Vitos, Levente
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