Hole superconductivity in the electron-doped superconductor Pr2−xCexCuO4
Y. Dagan, R. L. Greene
DOI 10.1103/PhysRevB.76.024506 · Physical Review B
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Abstract
We measure the resistivity and Hall angle of the electron-doped superconductor Pr2−xCexCuO4 as a function of doping and temperature. The resistivity ρxx at temperatures 100K<T<300K is mostly sensitive to the electrons. Its temperature behavior is doping independent over a wide doping range and even for nonsuperconducting samples. On the other hand, the transverse resistivity ρxy, or the Hall angle θH, where cot(θH)=ρxx∕ρxy, is sensitive to both holes and electrons. Its temperature dependence is strongly influenced by doping, and cot(θH) can be used to identify optimum doping (the maximum Tc) even well above the critical temperature. These results lead to a conclusion that in electron doped cuprates holes are responsible for the superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd1.85Ce0.15CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2-xLaxCuO6 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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