The authors report ambient-pressure, polarization-resolved electronic Raman scattering measurements on single crystals of nickelate La3Ni2O7, which becomes superconducting under pressure. Quantitative analysis reveals momentum-selective spin density wave (SDW) gap amplitudes, indicating an unconventional SDW driven by anisotropic electronic correlations.
- Ge He
- Jun Shen
- Dong-Lai Feng