The mixed-state Hall conductivity of single-crystal films $Nd_{2-x}Ce_xCuO_{4+\delta}$ (x=0.14)

TL;DR

This study investigates the magnetic-field dependence of Hall conductivity in underdoped Nd-Ce-Cu-O superconducting films, revealing a strong B-dependent behavior explained by quasiparticles and vortices contributions in the mixed state.

Contribution

It provides experimental evidence of a specific magnetic field dependence of Hall conductivity in electron-doped cuprates, highlighting the roles of quasiparticles and vortices.

Findings

Hall conductivity depends strongly on magnetic field in the transition region.

The dependence follows a C - b/B form, indicating mixed-state effects.

Both quasiparticles and Abrikosov vortices contribute to the Hall effect.

Abstract

The magnetic-field dependencies of the longitudinal and Hall resistivity of the electron-doped compounds $Nd_{2-x}Ce_xCuO_{4+\delta}$ in underdoped region (x=0.14) were investigated. It was established experimentally a strong magnetic field dependence of the Hall conductivity, $\sigma_{xy}(B)=C-b/B$, in the region of magnetic fields corresponding to a transition from superconducting to resistive state. The observed feature can be explained with the sum of contributions of the quasiparticles and moving Abrikosov vortices into Hall effect in a mixed state of type-II superconductor.