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Electronic structure of $NiS_{1-x}Se_x$

Krishnakumar, SR and Shanthi, N and Mahadevan, Priya and Sarma, DD (2000) Electronic structure of $NiS_{1-x}Se_x$. In: Physical Review B, 61 (24). pp. 16370-16377.

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We investigate the electronic structure of the metallic $NiS_{1-x}Se_x$ system using various electron spectroscopic techniques. The band-structure results do not describe the details of the spectral features in the experimental spectrum, even for this paramagnetic metallic phase. However, a parametrized many-body multiband model is found to be successful in describing the Ni 2p core level and valence band, within the same model. The asymmetric line shape as well as the weak intensity feature in the Ni 2p core-level spectrum have been ascribed to extrinsic loss processes in the system. The presence of satellite features in the valence-band spectrum shows the existence of the lower Hubbard band, deep inside the pd metallic regime, consistent with the predictions of the dynamical mean-field theory.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: Copyright belongs to American Physical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 22 Jun 2006
Last Modified: 19 Sep 2010 04:29
URI: http://eprints.iisc.ac.in/id/eprint/7665

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