[20p-B204-1~13] 6.3 Oxide electronics

△ [20p-B204-1] Li-content control of superconducting Li_1-xNbO₂ films by solution treatments

〇(M2)Aya Sato¹, Takuto Soma¹, Hiroshi Kumigashira^2,3, Akira Ohtomo¹ (1.Tokyo Tech., Dept. Chem. Sci. Eng., 2.KEK-IMSS, 3.Tohoku Univ., IMRAM)

Keywords:Layered compound, Superconductivity, Topochemical reactions

Li_1–xNbO₂ exhibits hole-doped superconductivity and has a 2H-type layered structure equivalent to transition metal dichalcogenides, which are two-dimensional materials. Recently, our group has succeeded in fabricating epitaxial thin films of Li_1–xNbO₂ that exhibit superconductivity and high transparency in visible light, by using solid-phase epitaxy and topochemical reactions. In this study, we quantitatively evaluated the amount of Li deintercalation and its depth profile aiming to elucidate the range of Li-content control and to explore new structures and properties by ion exchange.