Photoemission study of pyrite-type transition-metal chalcogenides MS2-xSex (M=Fe, Co, Ni)

Mamiya, K and Mizokawa, T and Fujimori, H and Takahashi, H and Mori, N and Miyadai, T and Suga, S and Chandrasekharan, Nirmala and Krishnakumar, SR and Sarma, DD (1997) Photoemission study of pyrite-type transition-metal chalcogenides MS2-xSex (M=Fe, Co, Ni). In: Physica B: Condensed Matter, 237 . pp. 390-391.

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Abstract

The electronic structures of pyrite-type transition-metal chalcogenides MS2-xSex (M = Fe, Co, Ni) has been investigated by photoemission and inverse-photoemission spectroscopy. The valence-band spectrum of ferromagnetic CoS2 does not show exchange splitting of the Co 3d peak, in disagreement with band-structure calculations. High-resolution photoemission spectra of NiS1.55Se0.45 shows spectral weight transfer from low (similar or equal to 50 meV) to high (0.2-0.5 eV) binding energies, in going from the metallic to the insulating phase.

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Photoemission spectroscopy;Electronic structure;Metal-insulator transi
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	30 Jun 2011 14:19
Last Modified:	30 Jun 2011 14:19
URI:	http://eprints.iisc.ac.in/id/eprint/38354

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