[17a-PB1-1~32] 6.3 Oxide electronics

[17a-PB1-15] Anisotropic metallic conduction near metal-insulator transition in (112 0) V₂O₃ films

〇Yuki Kinoshita¹, Takuto Soma¹, Akira Ohtomo¹, Kohei Yoshimatsu¹ (1.Science Tokyo)

Keywords:

Transition metal oxide,Metal Insulator transition

V₂O₃ exhibits a metal-insulator transition accompanied by a structural phase transition at ~150 K, and anisotropies in electrical and optical conductivity along the directions perpendicular and parallel to the c-axis have been reported in bulk V₂O₃. However, in bulk samples with large current paths, it is difficult to evaluate the intrinsic anisotropy in electrical conductivity. In this study, (11-20)-oriented V₂O₃ epitaxial thin films were fabricated, and by microfabricating cross-shaped structures with a high aspect ratio along directions perpendicular and parallel to the c-axis, anisotropic electrical conductivity in the metallic phase near the metal-insulator transition was observed.