[13p-D411-1~16] 6.3 Oxide electronics

[13p-D411-1] [Young Scientist Presentation Award Speech] Fast H⁻ conduction and diffusion mechanism in lanthanum oxyhydride LaH_3−2xO_x

〇Keiga Fukui¹, Soshi Iimura¹, Tomofumi Tada¹, Satoru Fujitsu¹, Masato Sasase¹, Hiromu Tamatsukuri², Takashi Honda², Kazutaka Ikeda², Toshiya Otomo², Hideo Hosono¹ (1.Tokyo Tech., 2.KEK)

Keywords:ionic conduction, hydride ion, oxyhydride

H⁻ conduction in lanthanum oxyhydride was investigated. Lanthanum oxyhydride (LaH_3−2xO_x) with x = 0.25 shows high H⁻ conductivity of 2.6 × 10⁻² S cm⁻¹ at 340°C. In molecular dynamics simulations, characteristic phenomenon that is a cooperative migration of H⁻ is observed. This indicates that H⁻ conduction in lanthanum oxyhydride originates from the interstitialcy diffusion.