X-ray photoemission study of NiS_{2-x}Se_x (x = 0.0 - 1.2)

2) ((1)Solid State; Bangalore); Bangalore (2) Jawaharlal Nehru Center for Advanced Scientific Research; D.D. Sarma (1; Indian Institute of Science; S.R. Krishnakumar (1); Structural Chemistry Unit

arxiv: cond-mat/0308340 · v1 · submitted 2003-08-18 · ❄️ cond-mat.str-el

X-ray photoemission study of NiS_(2-x)Se_x (x = 0.0 - 1.2)

S.R. Krishnakumar (1) , D.D. Sarma (1 , 2) ((1)Solid State , Structural Chemistry Unit , Indian Institute of Science , Bangalore (2) Jawaharlal Nehru Center for Advanced Scientific Research , Bangalore) This is my paper

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keywords systembandelectronicphotoemissionstatestructurex-rayanalysis

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Electronic structure of NiS_{2-x}Se_x 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 NiS_2 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 band width W of the system increases, driving the system from a covalent insulating state to a pd-metallic state.

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X-ray photoemission study of NiS_(2-x)Se_x (x = 0.0 - 1.2)

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