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

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: ${\rho }_{xy}$($B$)$\sim$ ${\rho }_{xx}^{\beta }$($B$). 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.

arXiv comment15 pages, 6 figures

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Cited by in corpus (3)

• Fe-As bond fluctuations in a double-well potential in LaFeAsO
• The mixed-state Hall conductivity of single-crystal films $N{d}_{2-x}C{e}_{x}Cu{O}_{4+\delta }$ (x=0.14)
• Hall resistivity correlations in disordered electron-doped Nd${}_{2-x}$Ce${}_x$CuO${}_{4+\delta }$ films