Polar compensation at the surface of SrTiO3 (111)

Mohammad Saghayezhian; Lina Chen; Gaomin Wang; Hangwen Guo; E. W. Plummer; Jiandi Zhang

doi:10.1103/PhysRevB.93.125408

Polar compensation at the surface of SrTiO3 (111)

Materials Science 2016-03-14 v1

Authors: Mohammad Saghayezhian , Lina Chen , Gaomin Wang , Hangwen Guo , E. W. Plummer , Jiandi Zhang

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Abstract

We have systematically investigated the annealing effect on the structure and composition of the polar surface of SrTiO3 (111), starting with an ex-situ chemical etch. The relative surface concentration between Ti and Sr strongly depends on both the annealing temperature and the oxygen processing. There is a critical annealing temperature at which the maximum concentration ratio of Ti to Sr is achieved, while still maintaining a (1 x 1) surface structure. We demonstrate that with proper processing it is possible to avoid surface reconstruction over a broad temperature range. Our results provide an optimal temperature window for epitaxial film growth.

Keywords

SrTiO3 (111) polar surface annealing effect surface composition surface reconstruction epitaxial film growth critical annealing temperature

Cite

@article{arxiv.1603.01680,
  title  = {Polar compensation at the surface of SrTiO3 (111)},
  author = {Mohammad Saghayezhian and Lina Chen and Gaomin Wang and Hangwen Guo and E. W. Plummer and Jiandi Zhang},
  journal= {arXiv preprint arXiv:1603.01680},
  year   = {2016}
}

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Accepted to Phys. Rev. B

Polar compensation at the surface of SrTiO3 (111)

Abstract

Keywords

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