Sarma, D. D. ; Pedio, M. ; Capozi, M. ; Girycki, A. ; Chandrasekharan, Nirmala ; Shanthi, N. ; Krishnakumar, S. R. ; Ottaviani, C. ; Quaresima, C. ; Perfetti, P. (1998) Unoccupied electronic states in NiS2−xSex across the metal-insulator transition Physical Review B: Condensed Matter and Materials Physics, 57 (12). pp. 6984-6988. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v57/i12/p6984_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.57.6984
Abstract
We investigate the evolution of the electronic structure across the insulator-metal transition in NiS2−xSex with changing composition, but in the absence of any structural or magnetic changes. A comparison of the inverse photoemission spectra with band-structure calculations establishes the importance of correlation effects in these systems. Systematic changes in the spectral distribution establish the persistence of the upper Hubbard band well into the metallic regime, with the insulator-to-metal transition being driven by a transfer of spectral weight from the Hubbard band to states close to the Fermi energy.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 46407 |
| Deposited On: | 04 Jul 2011 11:52 |
| Last Modified: | 04 Jul 2011 11:52 |
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