Evidence for a quantum phase transition in the electron-doped cuprate Pr2-xCexCuO4+d from Hall and resistivity measurements

TL;DR

This study investigates the doping and temperature effects on Hall coefficient and resistivity in Pr2-xCexCuO4+d, revealing evidence of a quantum phase transition near a critical doping level.

Contribution

It provides experimental evidence for a quantum phase transition in electron-doped cuprates through Hall and resistivity measurements.

Findings

Quantum phase transition near x=0.165 doping level

Doping dependence of Hall coefficient and resistivity

Temperature dependence of resistivity fits power law

Abstract

The doping and temperature dependence of the Hall coefficient, RH, and ab-plane resistivity in the normal state down to 350mK is reported for oriented films of the electron-doped high-Tc superconductor Pr2-xCexCuO4+d. The doping dependence of b (r=r0+AT^b) and R_sub_H (at 350 mK) suggest a quantum phase transition at a critical doping near x=0.165.