Nonlinear Hall resistivity in the overdoped Pr 1.82Ce0.18CuO4+δ electron-doped cuprate
S. Ghotb, M. Dion, G. Hardy, P. Fournier
DOI 10.1103/PhysRevB.110.134519 · Physical Review B
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Abstract
The Hall coefficient RH as a function of temperature for Pr2−xCexCuO4 (PCCO) at x=0.17 shows two sign changes between 0 and 300K that can be explained qualitatively using the two-carrier model. Using this two-carrier model, one predicts the presence of a nonlinear B3 contribution to the Hall resistivity ρyx that should be easily observed when the linear coefficient RH is approaching zero. We present the measurement of this nonlinear Hall resistivity for overdoped PCCO thin films at x=0.18. We show that this weak nonlinear term persists at all temperatures despite being dominated by the linear term (RHB). It is strongly temperature dependent and, analyzing it with the two-carrier model, we conclude that the density of electron carriers is larger than the hole density, but that the hole mobility is larger than that of the electrons. This nonlinear Hall resistivity should be observable for similar materials for which RH(T) goes through sign reversals as does overdoped PCCO.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr1.82Ce0.18CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.4 | Pressure not reported | midpoint |
| Pr2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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