Critical Doping for the Onset of Fermi-Surface Reconstruction by Charge-Density-Wave Order in the Cuprate Superconductor La 2 − x Sr x CuO 4

High-temperature superconductivity in cuprates is an ongoing mystery. Scientists show that two electronic phases of the cuprate La${}_{2\ensuremath{-}x}$Sr${}_{x}$CuO${}_{4}$ are in fact separate.