Revealing nanoscale structural phase separation in La${}_3$Ni${}_2$O${}_{7-\delta }$ single crystal via scanning near-field optical microscopy

Xiaoxiang Zhou, Weihong He, Kaipeng Ni +16

The discovery of superconductivity in La3Ni2O7-$\delta$ under high pressure,with an onset critical temperature around 80 K, has sparked significant interest in the superconducting phase…