Conservative antiphase boundary in SrTiO3 films on LaAlO3 substrates with SrRuO3 buffer layers

J. S. Wu*, C. L. Jia, K. Urban, J. H. Hao, X. X. Xi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We have studied the microstructure of SrTiO3 films on LaAlO3 substrates with the SrRuO3 buffer layer using high-resolution transmission electron microscopy. While high density of defects due to lattice mismatch were found at the SrRuO3/LaAlO3 interface, no misfit dislocation was observed at the SrTiO3/SrRuO3 interface. The {111} stacking fault in the SrRuO3 buffer layer propagates into the SrTiO3 film, giving rise to a type of antiphase boundary on the {110} plane with a crystallographic shear vector of a/2{001}!!!!. The boundary is a conservative one which does not lead to any charge defects. A model based on dislocation interactions is proposed to explain the generation mechanism of the antiphase boundary.

Original languageEnglish (US)
Pages (from-to)5653-5656
Number of pages4
JournalJournal of Applied Physics
Issue number10
StatePublished - May 15 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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