Sharp metal-insulator transition in Sr(Ti1-xVx)O 3-δ thin films on SrTiO3 substrates

K. Itaka, T. Wakisaka, T. Mihara, S. Yaginuma, Yuji Matsumoto, H. Koinuma

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Abstract

We fabricated Sr(Ti1-xVx)O3 composition-spread films on SrTiO3 (100) substrates by using pulsed laser deposition in ultra high vacuum. Sharp metal-insulator (MI) transitions were observed in the case of Sr(Ti1-xVx)O 3-δ composition-spread films grown on an oxygen deficient SrTiO3 (STO) buffer/SrTiO3 (STO) substrate in the restricted composition x=0.5-1.0 while no MI transition was observed in the case of Sr(Ti1-xVx)O3-δ below x=0.5. In the insulating phase below the MI transition, non-linear I-V characteristics were observed. To explain the appearance and disappearance of MI transitions in Sr(Ti1-xVx)O3-δ two possibilities were considered: (i) strain effect from the substrate and (ii) charge-transfer at the interface between Sr(Ti1-xVx)O3-δ and STO.

Original languageEnglish
Pages (from-to)222-225
Number of pages4
JournalThin Solid Films
Volume486
Issue number1-2
DOIs
Publication statusPublished - 2005 Aug 22
Externally publishedYes

Keywords

  • Conductivity
  • Laser ablation
  • Titanium oxide
  • Vanadium oxide

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

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