Perucchi, A. ; Marini, C. ; Valentini, M. ; Postorino, P. ; Sopracase, R. ; Dore, P. ; Hansmann, P. ; Jepsen, O. ; Sangiovanni, G. ; Toschi, A. ; Held, K. ; Topwal, D. ; Sarma, D. D. ; Lupi, S. (2009) Pressure and alloying effects on the metal to insulator transition in NiS2−xSex studied by infrared spectroscopy Physical Review B: Condensed Matter and Materials Physics, 80 (7). 073101_1-073101_4. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v80/i7/e073101
Related URL: http://dx.doi.org/10.1103/PhysRevB.80.073101
Abstract
The metal to insulator transition in the charge-transfer NiS2−xSex compound has been investigated through infrared reflectivity. Measurements performed by applying pressure to pure NiS2 (lattice contraction) and by Se alloying (lattice expansion) reveal that in both cases an anomalous metallic state is obtained. We find that optical results are not compatible with the linear Se-alloying vs pressure-scaling relation previously established through transport, thus pointing out the substantially different microscopic origin of the two transitions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 46381 |
| Deposited On: | 04 Jul 2011 12:13 |
| Last Modified: | 18 May 2016 02:17 |
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