Determining the energetics of vicinal perovskite oxide surfaces
Werner A. Wessels, Tjeerd R.J. Bollmann, Gertjan Koster and, Harold J.W. Zandvliet, Guus Rijnders
TL;DR
This study investigates the energetics of vicinal perovskite oxide surfaces using atomic force microscopy, revealing that local oxygen coordination primarily influences surface energetics and identifying similar kink formation energies and step undulation patterns.
Contribution
The paper provides the first detailed analysis of vicinal SrTiO₃ and DyScO₃ surfaces, highlighting the role of oxygen coordination in their surface energetics.
Findings
Similar kink formation energies for both surfaces
Triangular step undulation observed
Surface energetics dominated by local oxygen coordination
Abstract
The energetics of vicinal SrTiO(001) and DyScO(110), prototypical perovskite vicinal surfaces, has been studied using topographic atomic force microscopy imaging. The kink formation and strain relaxation energies are extracted from a statistical analysis of the step meandering. Both perovskite surfaces have very similar kink formation energies and exhibit a similar triangular step undulation. Our experiments suggest that the energetics of perovskite oxide surfaces is mainly governed by the local oxygen coordination.
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