Electronic structure and two-orbital model of the quadlayer La${}_5$Ni${}_4$O${}_{13}$

Jian-Xiang Sun, Haokan Xiao, Cui-Qun Chen +1

The discovery of pressure-induced superconductivity in Ruddlesden--Popper (RP) nickelates has stimulated extensive interest in high-T${}_c$ superconductors. Here, we systematically s…