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X-ray photoemission study of NiS2-xSex (x = 0.0–1.2)

Krishnakumar, SR and Sarma, DD (2003) X-ray photoemission study of NiS2-xSex (x = 0.0–1.2). In: Physical Review B (Condensed Matter and Materials Physics), 68 . 155110-1-7.

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Abstract

Electronic structure of NiS2–xSex system has been investigated for various compositions (x) using x-ray photoemission spectroscopy. An analysis of the core-level as well as the valence-band spectra of NiS2 in conjunction with many-body cluster calculations provides a quantitative description of the electronic structure of this compound. With increasing Se content, the on-site Coulomb correlation strength (U) does not change, while the bandwidth W of the system increases, driving the system from a covalent insulating state to a pd-metallic state.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to American Physical Society (APS).
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 15 Sep 2004
Last Modified: 19 Sep 2010 04:16
URI: http://eprints.iisc.ernet.in/id/eprint/1972

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