Resonance in the electron-doped high-transition-temperature superconductor Pr 0.88 LaCe 0.12 CuO 4- δ

The discovery of the resonance in electron-doped superconducting Pr 0.88 LaCe 0.12 CuO 4-δd ( T c = 24 K) demonstrates that the resonance is a fundamental property of the superconducting copper oxides and therefore must play an essential role in the mechanism of superconductivity.