Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$

T. B. Charikova; N. G. Shelushinina; G. I. Harus; D. S. Petukhov; O. E. Petukhova; A. A. Ivanov

doi:10.1016/j.physc.2016.05.003

paper

Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd $_{2 - x}$ Ce $_{x}$ CuO $_{4 + δ}$

arXiv:1601.04804 · doi:10.1016/j.physc.2016.05.003

Abstract

The magnetic-field dependencies of the longitudinal and Hall resistance of the electron-doped compounds Nd $_{2 - x}$ Ce $_{x}$ CuO $_{4 + δ}$ in underdoped region with $x$ =0.14 and with varying degrees of disorder ( $δ$ ) were investigated. It was established experimentally that the correlation between the longitudinal electrical resistivity and the Hall resistivity can be analyzed on the basis of scaling relationships: $ρ_{x y}$ ( $B$ ) $\sim$ $ρ_{xx}^{β}$ ( $B$ ). For the totality of the investigated single-crystal films of Nd $_{2 - x}$ Ce $_{x}$ CuO $_{4 + δ}$ /SrTiO $_{3}$ the universal value $β$ =1.5 $\pm$ 0.4 is found. The observed feature in the electron-doped two-dimensional systems can be associated both with a displaying of anisotropic $s$ - wave or $d$ -wave pairing symmetry and with a rather strong pinning due to an essential degree of disorder in the samples under study.

15 pages, 6 figures

Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd2−x​Cex​CuO4+δ​

Abstract

Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd $_{2 - x}$ Ce $_{x}$ CuO $_{4 + δ}$