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Is Nd2−xCexCuO4 an electron-superconductor? |
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| Authors: | N. Nücker P. Adelmann M. Alexander H. Romberg S. Nakai J. Fink H. Rietschel G. Roth H. Schmidt H. Spille |
| Affiliation: | (1) Kernforschungszentrum Karlsruhe, Institut für Nucleare Festkörperphysik, P.O. Box 3640, D-7500 Karlsruhe, Federal Republic of Germany;(2) Institut für Festkörperphysik, Technische Hochschule Darmstadt, Hochschulstraße 2, D-6100 Darmstadt, Federal Republic of Germany |
| Abstract: | We present results from electron energy-loss spectroscopy on Nd2–xCexCuO4. There is no clear evidence for Cu1+ but for holes at the oxygen sites. The valency of Ce is found to be close to 3.4. Thus our results do not corroboraten-type superconductivity in this compound. |
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