Revealing superconducting gap in La${}_3$Ni${}_2$O${}_7$-$\hat{I}´$ by Andreev reflection spectroscopy under high pressure

Jianning Guo, Yuzhi Chen, Yulong Wang +5

The recent discovery of compressed superconductivity at 80~K in La${}_3$Ni${}_2$O${}_7$-$\hat{I}´$ has brought nickelates into the family of unconventional high-temperature superconductors. Ho…