Superconducting mechanism for a new-type cuprate Ba2CuO3+δ based on a multiorbital Lieb lattice model

Kimihiro Yamazaki, Masayuki Ochi, Daisuke Ogura, ∗ Kazuhiko Kuroki, Hiroshi Eisaki, Shinichi Uchida, 3 and Hideo Aoki 4 Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan Institute of Physics, Chinese Academy of Science, Beijing 100190, China Department of Physics, The University of Tokyo, Hongo, Tokyo 113-0033, Japan