[15p-W9_325-1~12] 11.1 Fundamental properties

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)

[15p-W9_325-6] Theoretical study of a candidate superconductor La₃Ni₂O₆ based on Orbital-Space Bilayer Model

〇Shu Kamiyama¹, Reo Kohno², Yuto Hoshi², Kensei Ushio², Daiki Nakaoka², Hirofumi Sakakibara^2,3, Kazuhiko Kuroki¹ (1.Dept. of Phys., Univ. of Osaka, 2.Fac. of Eng., Tottori Univ., 3.AMES., Tottori Univ.)

Keywords:

nickelate superconductor

In bilayer models, superconducting transition temperatures higher than those of cuprates have been theoretically suggested. We have previously identified a correspondence between multi-orbital and bilayer models, and shown that superconductivity is enhanced with increasing orbital level offset ΔE in multi-orbital systems. We refer to such multi-orbital systems as the Orbital-Space Bilayer Model (OSBM). Superconductors based on the OSBM have not yet been reported. In this study, we focus on La₃Ni₂O₆ as a candidate of OSBM superconductor. We propose the possibility of superconductivity in hole-doping based on first-principles calculations and the fluctuation-exchange approximation.