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Electrons and holes in undoped Nd2CuO4 |
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| Authors: | Marco Scavini Gaetano Chiodelli Giorgio Spinolo Giorgio Flor |
| Affiliation: | Department of Physical Chemistry and CSTE/CNR, University of Pavia, I-27100, Pavia, Italy |
| Abstract: | Nd2CuO4±δ is the non-superconducting prototype of the Re2−xMxCuO4t−y family (Re=Pr, Nd, Sm and M=Ceor Th) of n-type oxide superconductors. Four-probe DC conductivity, EMF in P(O2) gradient, and thermopower measurements have been used to characterise its electric transport and defect structure between 300 and 900°C and between 5×10−4 and 1 atm oxygen partial pressure. The results show that Nd2CuO4±δ can be oxygen under-stoichiometric (with n-type conductivity), near-stoichiometric, and over-stoichiometric (with p-type conductivity) in different T, P(O2) ranges. |
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