Preparation of thermally stable TiO2-terminated SrTiO 3(100) substrate surfaces

T. Ohnishi, K. Shibuya, M. Lippmaa, D. Kobayashi, H. Kumigashira, M. Oshima, H. Koinuma

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91 Citations (Scopus)

Abstract

The thermal stability of TiO2-terminated SrTiO3(100) surfaces was investigated. The composition of the terminating atomic layer at temperatures up to 100°C, was measured using in situ coaxial impact-collision ion scattering spectroscopy. It was found that the TiO 2 termination of a nonannealed but HF-etched surface started collapsing at temperatures as low as 300 °C, showing thermal instability of the chemically cleaved surface. An alternative way to prepare a stabilized SrTiO3 surface, which maintains a perfect TiO2 termination up to 700 °C, ideal for the growth of atomically sharp oxide heterointerfaces, was also presented.

Original languageEnglish
Pages (from-to)272-274
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number2
DOIs
Publication statusPublished - 2004 Jul 12
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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