Correlation Effects and Concomitant Two-Orbital $s_{\pm }$-Wave Superconductivity in La${}_3$Ni${}_2$O${}_7$ under High Pressure

Yi-Heng Tian, Yin Chen, Jia-Ming Wang +2

Possible high-$T_c$ superconductivity (SC) has been found experimentally in the bilayer material La${}_3$Ni${}_2$O${}_7$ under high pressure recently, in which the Ni-$3d_{3z^2-r^2}$ and…