Domain formation in anatase TiO 2 thin films on LaAlO 3 substrates

Shijian Zheng, Craig A.J. Fisher, Takeharu Kato, Yuki Nagao, Hiromichi Ohta, Yuichi Ikuhara

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Using advanced Cs-corrected scanning transmission electron microscopy, we have observed the atomic structures of coherent TiO 2/LaAlO 3 heterointerfaces in anatase TiO 2 thin films deposited on single-crystal LaAlO 3. Two epitaxial relationships are identified: (001)[100] TiO 2//(001)[100] LaAlO 3 and (001)[010] TiO 2//(001)[100] LaAlO 3. These epitaxial relationships and the terrace steps on the substrate surface result in the formation of multidomains in the anatase TiO 2 thin films. Three types of domain boundaries are identified, namely, 90°rotation domain boundaries, translation domain boundaries, and mixtures of the two. These domain boundaries are expected to have a profound effect on the properties of the thin film.

Original languageEnglish
Article number191602
JournalApplied Physics Letters
Volume101
Issue number19
DOIs
Publication statusPublished - 2012 Nov 5
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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