Pressure-dependent "Insulator-Metal-Insulator" Behavior in Sr-doped La${}_3$Ni${}_2$O${}_7$

Mingyu Xu, Shuyuan Huyan, Haozhe Wang +7

Recently, superconductivity at high temperatures has been observed in bulk La${}_3$Ni${}_2$O${}_{7-\delta }$ under high pressure. However, the attainment of high-purity La${}_3$Ni${}_2$O${}_{7-\delta }$ s…