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

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

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arXiv · 1601.04804

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

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

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Abstract

The magnetic-field dependencies of the longitudinal and Hall resistance of the electron-doped compounds Nd$_{2-x}$Ce$_x$CuO$_{4+\delta}$ in underdoped region with $x$=0.14 and with varying degrees of disorder ($\delta$) 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: $\rho_{xy}$($B$)$\sim$ $\rho^{\beta}_{xx}$($B$). For the totality of the investigated single-crystal films of Nd$_{2-x}$Ce$_x$CuO$_{4+\delta}$/SrTiO$_3$ the universal value $\beta$=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.

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T. B. Charikova, N. G. Shelushinina, G. I. Harus, D. S. Petukhov, O. E. Petukhova, A. A. Ivanov. 2016-01-19. Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd$_{2-x}$Ce$_x$CuO$_{4+\delta}$. https://doi.org/10.1016/j.physc.2016.05.003

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