Strain-Induced Defect Superstructure on the SrTiO3(110) Surface

Zhiming Wang, Fengmiao Li, Sheng Meng, Jiandi Zhang, E. W. Plummer, Ulrike Diebold, and Jiandong Guo
Phys. Rev. Lett. 111, 056101 – Published 2 August 2013
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Abstract

We report on a combined scanning tunneling microscopy and density functional theory calculation study of the SrTiO3(110)(4×1) surface. It is found that antiphase domains are formed along the [11¯0]-oriented stripes on the surface. The domain boundaries are decorated by defect pairs consisting of Ti2O3 vacancies and Sr adatoms, which relieve the residual stress. The formation energy of and interactions between vacancies result in a defect superstructure. It is suggested that the density and distributions of defects can be tuned by strain engineering, providing a flexible platform for the designed growth of complex oxide materials.

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  • Received 30 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.056101

© 2013 American Physical Society

Authors & Affiliations

Zhiming Wang1,2, Fengmiao Li1, Sheng Meng1, Jiandi Zhang3, E. W. Plummer3, Ulrike Diebold2, and Jiandong Guo1,*

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
  • 2Institute of Applied Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10/134, A-1040 Vienna, Austria
  • 3Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA

  • *jdguo@iphy.ac.cn

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Vol. 111, Iss. 5 — 2 August 2013

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