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Polarizable interatomic force field for TiO2 parametrized using density functional theory
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 13, 134108- p.Article in journal (Refereed) Published
Abstract [en]

We report a classical interatomic force field for TiO2, which has been parametrized using density functional theory forces, energies, and stresses in the rutile crystal structure. The reliability of this classical potential is tested by evaluating the structural properties, equation of state, phonon properties, thermal expansion, and some thermodynamic quantities such as entropy, free energy, and specific heat under constant volume. The good agreement of our results with ab initio calculations and with experimental data, indicates that our force field describes the atomic interactions of TiO2 in the rutile structure very well. The force field can also describe the structures of the brookite and anatase crystals with good accuracy.

Place, publisher, year, edition, pages
2010. Vol. 81, no 13, 134108- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-137780DOI: 10.1103/PhysRevB.81.134108ISI: 000277207900024OAI: oai:DiVA.org:uu-137780DiVA: diva2:378558
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

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