Superconducting mechanism for the cuprate Ba${}_2$CuO${}_{3+\delta }$ based on a multiorbital Lieb lattice model

Kimihiro Yamazaki, Masayuki Ochi, Daisuke Ogura +4

For the recently discovered cuprate superconductor $\mathrm{B}{\mathrm{a}}_2\mathrm{Cu}{\mathrm{O}}_{3+\delta }$, we propose a lattice structure which resembles the model considered by Lieb to represent the vastly o…