Coexistence of Antiferromagnetism and Superconductivity in Electron-doped High-Tc Superconductors

TL;DR

This study provides magnetotransport evidence for the coexistence of antiferromagnetism and superconductivity in electron-doped cuprate films, revealing a quantum phase transition near optimal doping.

Contribution

It demonstrates the coexistence of antiferromagnetism and superconductivity in electron-doped cuprates through magnetotransport measurements, identifying a quantum phase transition.

Findings

Antiferromagnetism persists up to optimal doping x=0.15.

Quantum phase transition occurs near x=0.16.

Static antiferromagnetism coexists with superconductivity for 0.12 ≤ x ≤ 0.15.

Abstract

We present magnetotransport evidence for antiferromagnetism in films of the electron-doped cuprates Pr$_{2-x}$Ce$_x$CuO$_4$. Our results show clear signature of static antiferromagnetism up to optimal doping x=0.15, with a quantum phase transition close to x=0.16, and a coexistence of static antiferromagnetism and superconductivity for 0.12$\le$x$\le$0.15.