Valence instability and photochemical reaction at surface of strongly correlated MgTi2O4

H. Fujiwara, Y. Ishige, Takashi Mizokawa, T. Sasaki, M. Isobe, Y. Ueda

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Abstract

We have studied surface electronic structure and light illumination effect of spinel-type MgTi2O4 with Ti3+(d1) electronic configuration. Ti4+ species are found at surfaces of MgTi2O4, which show photo-induced effect similar to the Ti4+-oxide semiconductors with surface depletion layer. MgTi 2O4 with the surface Ti4+ states reacts with water for H2 emission, which is largely enhanced by light illumination.

Original languageEnglish
Article number022110
JournalAPL Materials
Volume1
Issue number2
DOIs
Publication statusPublished - 2013
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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