[1Dp01-13] TF/SE/EMP/MI/MS

[1Dp02] Metal-insulator transition in hydrogenated NdNiO₃

*Ikuya Matsuzawa¹, Takahiro Ozawa¹, Yusuke Nishiya¹, Umar Sidik², Azusa Hattori², Hidekazu Tanaka², Katsuyuki Fukutani^1,3 (1. The University of Tokyo, 2. Osaka University, 3. Japan Atomic Energy Agency)

Perovskite nickelates RNiO₃ with rare earths as R exhibits a metal-insulator transition (MIT) due to temperature changes., and there are many materials in which physical properties such as magnetism and electric conductivity change due to hydrogen doping. A Rrecent studies study, on the other hand, have suggested that doping RNiO3 with hydrogen induces a new insulating state, and it has been reportedshown that the resistance of SmNiO₃(SNO) changes significantly at room temperature due to hydrogen doping. However, the mechanism of hydrogen-induced MIT is not well understood. The purpose of my our research is to elucidate the mechanism of hydrogen-induced MIT in RNiO₃ by experimentally measuring the relation between the hydrogen concentration and electronic structure.