Hisayoshi Itoh

TL;DR: In this paper, the authors used ab initio band calculations to find that mixing of the S 3p states with the valence band can contribute to the band gap narrowing, based on the theoretical analyses.

TL;DR: In this article, the electronic structures of titanium dioxide (TiO 2 ) doped with 3d transition metals (V, Cr, Mn, Fe, Co and Ni) have been analyzed by ab initio band calculations based on the density functional theory with the full-potential linearized-augmented-plane-wave method.

TL;DR: Electron paramagnetic resonance and ab initio supercell calculations suggest that the P6/P7 centers, which were previously assigned to the photoexcited triplet states of the carbon vacancy-antisite pairs in the double positive charge state, are related to the triplet groundStates of the neutral divacancy.

TL;DR: In this article, the intrinsic point defects in 3C-SiC have been characterized by electron spin resonance (ESR), positron annihilation spectroscopy (PAS), Hall and photoluminescence (PL) techniques and the structure and annealing behavior of intrinsic defects, e.g. monovacancies at silicon and carbon sublattice sites, are described based on the results obtained by ESR and PAS.

TL;DR: In this article, the authors implanted 200 keV F+ in a single crystalline titanium dioxide (TiO2) rutile at a nominal fluence of 1.5 to 1.7 ions cm−2 and then thermally annealed the implanted sample in air.