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Diffusion of N adatoms on the Fe(100) surface
University of Aarhus, Aarhus, Denmarkv.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
University of Aarhus, Aarhus, Denmark.
Danish Technical University, Lyngby, Denmark.
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2000 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 84, no 21, 4898-4901 p.Article in journal (Refereed) Published
Abstract [en]

The diffusion of individual N adatoms on Fe(100) has been studied using scanning tunneling microscopy and ab initio density functional theory (DFT) calculations. The measured diffusion barrier for isolated N adatoms is E-d = (0.92 +/- 0.04) eV, with a prefactor of nu(0) = 4.3 x 10(12) s(-1), which is in quantitative agreement with the DFT calculations. Thr; diffusion is strongly coupled to lattice distortions. and. as a consequence, the presence of other N adatoms introduces an anisotropy in the diffusion. Based on experimentally determined values of the diffusion barriers and adsorbate-adsorbate: interactions, the potential energy surface experienced by a N adatom is determined.

Place, publisher, year, edition, pages
2000. Vol. 84, no 21, 4898-4901 p.
National Category
Condensed Matter Physics Other Physics Topics
URN: urn:nbn:se:uu:diva-235932DOI: 10.1103/PhysRevLett.84.4898ISI: 000087114400029OAI: oai:DiVA.org:uu-235932DiVA: diva2:762461
Available from: 2014-11-11 Created: 2014-11-11 Last updated: 2014-11-11

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Österlund, Lars
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