Sensitive dependence of pairing symmetry on Ni-$e_g$ crystal field splitting in the nickelate superconductor La${}_3$Ni${}_2$O${}_7$

Chengliang Xia, Hongquan Liu, Shengjie Zhou +1

The discovery of high-temperature superconductivity in La${}_3$Ni${}_2$O${}_7$ under pressure has drawn great attention. However, consensus has not been reached on its pairing symmetry i…