Density-wave-like gap evolution in La${}_3$Ni${}_2$O${}_7$ under high pressure revealed by ultrafast optical spectroscopy

Yanghao Meng, Yi Yang, Hualei Sun +8

Density wave (DW) order is believed to be correlated with superconductivity in the recently discovered high-temperature superconductor La${}_3$Ni${}_2$O${}_7$. However, experimental inve…