Effect of Sr doping on LaTiO 3 thin films

B. Vilquin, T. Kanki, T. Yanagida, H. Tanaka, T. Kawai

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

We report on the electric properties of La 1-x Sr x TiO 3 (0 ≤ x ≤ 0.5) thin films fabricated by pulsed laser deposition method. Crystallographic measurement of the thin films showed the epitaxial c-axis perovskite structure. The electric property of LaTiO 3 thin film, which is a typical Mott insulative material in bulk, showed insulative behaviour, while the Sr-doped films showed metallic conduction suffering electron-electron scattering. Below x = 0.1, the major carrier type was identified to be hole, and switched to electron with further increasing Sr-doping above x = 0.15. In fact, the switching from p-type to n-type for La 1-x Sr x TiO 3 thin films is first demonstrated in this study. The transition suggests that effective Coulomb gap vanishes due to over-additional Sr doping.

Original languageEnglish
Pages (from-to)494-497
Number of pages4
JournalApplied Surface Science
Volume244
Issue number1-4
DOIs
Publication statusPublished - May 15 2005
Externally publishedYes
Event12th International Conference on Solid Films and Surfaces - Hammatsu, Japan
Duration: Jun 21 2004Jun 25 2004

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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