Charge-transfer and the location of superconducting holes in La2 − SrCuO4

As β increases in La2 − βSrβCuO4, holes transfer from the cuprate-planes to the LaO layers—the opposite of what the charge-transfer hypothesis predicts. We interpret this analyzed charge-transfer as indicating that the superconductivity originates in the vicinity of LaO layers, not in the cuprate-planes—contrary to previous interpretations of measurements which place the origin of superconductivity in the cuprate-planes.