Okazaki, K. ; Mizokawa, T. ; Fujimori, A. ; Sampathkumaran, E. V. ; Martinez-Lope, M. J. ; Alonso, J. A. (2003) Crossover in the nature of the metallic phases in the perovskite-type RNiO3 Physical Review B: Condensed Matter and Materials Physics, 67 (7). 073101_1-073101_4. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v67/i7/e073101
Related URL: http://dx.doi.org/10.1103/PhysRevB.67.073101
Abstract
We have measured the photoemission spectra of Nd1−xSmxNiO3, where the metal-insulator transition and the Néel ordering occur at the same temperature for x≲0.4 and the metal-insulator transition temperature (TMI) is higher than the Néel temperature for x≳0.4. For x < ~0.4, the spectral intensity at the Fermi level is high in the metallic phase above TMI and gradually decreases with cooling in the insulating phase below TMI while for x > 0.4 it shows a pseudogaplike behavior above TMI and further diminishes below TMI. The results clearly establish that there is a change in the nature of the electronic correlations in the middle (x~0.4) of the metallic phase of the RNiO3 system.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 45686 |
| Deposited On: | 29 Jun 2011 03:28 |
| Last Modified: | 29 Jun 2011 03:28 |
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