Valence instability and photochemical reaction at surface of strongly correlated MgTi2O4
oleh: H. Fujiwara, Y. Ishige, T. Mizokawa, T. Sasaki, M. Isobe, Y. Ueda
| Format: | Article |
|---|---|
| Diterbitkan: | AIP Publishing LLC 2013-08-01 |
Deskripsi
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. MgTi2O4 with the surface Ti4+ states reacts with water for H2 emission, which is largely enhanced by light illumination.