Three-dimensional collective charge excitations in electron-doped copper oxide superconductors

Three-dimensional collective charge excitations in electron-doped copper oxide superconductors

Three-dimensional collective charge excitations in electron-doped copper oxide superconductors, Published online: 31 October 2018; doi:10.1038/s41586-018-0648-3

Resonant inelastic X-ray scattering on electron-doped copper oxide superconductors reveals a three-dimensional charge collective mode, which has properties suggestive of the long-sought acoustic plasmon.