Doping and energy evolution of spin dynamics in the electron-doped cuprate superconductor Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-\delta}$

TL;DR

This study investigates how magnetic excitations in an electron-doped cuprate superconductor evolve with doping and energy, revealing a transition from commensurate to incommensurate scattering and a dome-shaped resonance energy.

Contribution

It introduces a kinetic energy driven mechanism to explain the doping and energy evolution of spin dynamics in Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4- ext{delta}}$, highlighting a broad scattering peak and a dome-shaped resonance.

Findings

Broad low-energy commensurate scattering peak observed

Resonance energy located within low-energy scattering range

Doping-dependent resonance energy exhibits a dome shape

Abstract

The doping and energy evolution of the magnetic excitations of the electron-doped cuprate superconductor Pr$_{0.88}$LaCe$_{0.12}$CuO$_{4-\delta}$ in the superconducting state is studied based on the kinetic energy driven superconducting mechanism. It is shown that there is a broad commensurate scattering peak at low energy, then the resonance energy is located among this low energy commensurate scattering range. This low energy commensurate scattering disperses outward into a continuous ring-like incommensurate scattering at high energy. The theory also predicts a dome shaped doping dependent resonance energy.