Sanville et al 2009.pdf (710.41 kB)
Surface and interstitial transition barriers in rutile (110) surface growth
journal contribution
posted on 2013-02-01, 14:04 authored by E. Sanville, Louis J. Vernon, Steven KennySteven Kenny, Roger Smith, Y. Moghaddam, C. Browne, P. MulheranWe present calculated surface and interstitial transition barriers for Ti, O, O2, TiO, and TiO2 atoms and clusters at the rutile (110) surface. Defect structures involving these small clusters, including adcluster and interstitial binding sites, were calculated by energy minimization using density-functional theory (DFT). Transition energies between these defect sites were calculated using the NEB method. Additionally, a modified SMB-Q charge equilibration empirical potential and a fixed-charge empirical potential were used for a comparison of the transition energy barriers. Barriers of 1.2–3.5 eV were found for all studied small cluster transitions upon the surface except for transitions involving O2. By contrast, the O2 diffusion barriers along the [001] direction upon the surface are only 0.13 eV. The QEq charge equilibration model gave mixed agreement with the DFT calculations, with the barriers ranging between 0.8 and 5.8 eV.
History
School
- Science
Department
- Mathematical Sciences
Citation
SANVILLE, E. ... et al., 2009. Surface and interstitial transition barriers in rutile (110) surface growth. Physical Review B (Condensed Matter and Materials Physics), 80 (23), 9 pp.Publisher
© The American Physical SocietyVersion
- VoR (Version of Record)
Publication date
2009Notes
This article was published in the journal, Physical Review B (Condensed Matter and Materials Physics) [© The American Physical Society]. The definitive version is available at: http://dx.doi.org/10.1103/PhysRevB.80.235308ISSN
1098-0121Publisher version
Language
- en