Shubnikov-de Haas quantum oscilations reveal a reconstructed Fermi surface near optimal doping in a thin film of the cuprate superconductor Pr$_{1.86}$Ce$_{0.14}$CuO$_{4\pm\delta}$

TL;DR

This study uses high magnetic fields to observe quantum oscillations in a thin film of the electron-doped cuprate superconductor, revealing a reconstructed small Fermi surface consistent with overdoped behavior.

Contribution

It provides the first direct evidence of Fermi surface reconstruction in Pr$_{2-x}$Ce$_x$CuO$_{4 ext{-}\delta}$ thin films near optimal doping using quantum oscillations.

Findings

Observation of a single quantum oscillation frequency of 255 T.

Identification of a small Fermi pocket about 1% of the Brillouin zone.

Electronic properties align with overdoped cuprate characteristics.

Abstract

We study magnetotransport properties of the electron-doped superconductor Pr$_{2-x}$Ce$_x$CuO$_{4\pm\delta}$ with $x$ = 0.14 in magnetic fields up to 92~T, and observe Shubnikov de-Haas magnetic quantum oscillations. The oscillations display a single frequency $F$=255$\pm$10~T, indicating a small Fermi pocket that is $\sim$~1\% of the two-dimensional Brillouin zone and consistent with a Fermi surface reconstructed from the large hole-like cylinder predicted for these layered materials. Despite the low nominal doping, all electronic properties including the effective mass and Hall effect are consistent with overdoped compounds. Our study demonstrates that the exceptional chemical control afforded by high quality thin films will enable Fermi surface studies deep into the overdoped cuprate phase diagram.