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Ab initio study of the electronic and magnetic structure of the TiO2 rutile (110)/Fe interface
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 88, no 15, 155401- p.Article in journal (Refereed) Published
Abstract [en]

Adsorption of Fe on the rutile (110) surface is investigated by means of ab initio density functional theory calculations. We discuss the deposition of single Fe atoms and increasing Fe coverage, as well as the adsorption of small Fe clusters. It is shown that the different interface structures found in experiment can be understood in terms of the adsorption of the Fe atoms landing first on the rutile surface. Strong interface bonds form if single Fe atoms are deposited. The Fe-Fe bonds in deposited Fe clusters lead to a three-dimensional growth mode. Mainly ionic Fe oxide bonds are formed in both cases and the electronic band gap of the surface is reduced due to interface states. In addition to the structural and electronic properties, we discuss the influence of the interface on the magnetic properties, finding stable Fe moments and induced moments within the interface which lead to a large spin polarization of the Fe atoms at the rutile (110)/Fe interface.

Place, publisher, year, edition, pages
2013. Vol. 88, no 15, 155401- p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-210181DOI: 10.1103/PhysRevB.88.155401ISI: 000325183300003OAI: oai:DiVA.org:uu-210181DiVA: diva2:661560
Available from: 2013-11-04 Created: 2013-11-04 Last updated: 2017-12-06Bibliographically approved

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Herper, Heike C.

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