[9a-A31-1~13] 11.1 Fundamental properties

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9a-A31-7] Theoretical study of a candidate superconductor AE₃Ni₂O₄Cl₂ based on orbital-space bilayer model

〇Shu Kamiyama¹, Yuto Hoshi², Masayuki Ochi¹, Hirofumi Sakakibara², Kazuhiko Kuroki¹ (1.Univ. of Osaka, 2.Tottori Univ.)

Keywords:

superconductor,nickelate

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 AE₃Ni₂O₄Cl₂ (AE=Ca, Sr) as a candidate of OSBM superconductor. We propose the possibility of superconductivity in lightly electron-doping based on first-principles calculations and the fluctuation-exchange approximation.