X-ray photoemission spectroscopic study of impurity effect and d-band formation induced by the substituted 4d transition metal atoms in Ni 1-xRhxS

Takeshi Mamori, Masanori Matoba, Shuichiro Anzai, Atsushi Fujimori

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effect of Rh substitution on the electronic structure of charge transfer type compound NiS is studied by XPS. We find the following results. (1) A narrow band is newly superimposed on the main peak (d8L) of NiS in the valence band region and its width increases with x. (2) The peak position and the line shape of Rh 3d core level spectra are very close to that of Rh metal. (3) The S 2s and the S 2P3/2 core level peaks shift toward higher binding energy (EB) with increasing x. (4) The Ni 2P 3/2 core level main peak (d9L) shifts toward lower E B with increasing x. (5) The EB separation of the Ni 2P3/2 main and satellite peaks decreases as x increases, while the relative intensity of the latter peak to the former one increases. We suggest a tentative model that a Mott-Hubbard type metallic d-band is superimposed on charge transfer type host NiS, and that this contribution is one of the electronic origin for dTt/dx<0 reported previously. The origin of the metallic band is attributed to the Rh-Rh and/or Ni-Rh interactions in Ni1-xRhxS.

Original languageEnglish
Pages (from-to)1031-1036
Number of pages6
JournalJournal of the Physical Society of Japan
Volume62
Issue number3
Publication statusPublished - 1993 Mar

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photoelectric emission
transition metals
impurities
atoms
x rays
charge transfer
shift
line shape
narrowband
binding energy
substitutes
electronic structure
valence
electronics
metals
interactions

Keywords

  • Charge transfer type compounds
  • d-band formation
  • Metal impurity
  • Metal-nonmetal transition 4d transition
  • NiRhS
  • NiS
  • XPS

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

X-ray photoemission spectroscopic study of impurity effect and d-band formation induced by the substituted 4d transition metal atoms in Ni 1-xRhxS. / Mamori, Takeshi; Matoba, Masanori; Anzai, Shuichiro; Fujimori, Atsushi.

In: Journal of the Physical Society of Japan, Vol. 62, No. 3, 03.1993, p. 1031-1036.

Research output: Contribution to journalArticle

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T1 - X-ray photoemission spectroscopic study of impurity effect and d-band formation induced by the substituted 4d transition metal atoms in Ni 1-xRhxS

AU - Mamori, Takeshi

AU - Matoba, Masanori

AU - Anzai, Shuichiro

AU - Fujimori, Atsushi

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N2 - The effect of Rh substitution on the electronic structure of charge transfer type compound NiS is studied by XPS. We find the following results. (1) A narrow band is newly superimposed on the main peak (d8L) of NiS in the valence band region and its width increases with x. (2) The peak position and the line shape of Rh 3d core level spectra are very close to that of Rh metal. (3) The S 2s and the S 2P3/2 core level peaks shift toward higher binding energy (EB) with increasing x. (4) The Ni 2P 3/2 core level main peak (d9L) shifts toward lower E B with increasing x. (5) The EB separation of the Ni 2P3/2 main and satellite peaks decreases as x increases, while the relative intensity of the latter peak to the former one increases. We suggest a tentative model that a Mott-Hubbard type metallic d-band is superimposed on charge transfer type host NiS, and that this contribution is one of the electronic origin for dTt/dx<0 reported previously. The origin of the metallic band is attributed to the Rh-Rh and/or Ni-Rh interactions in Ni1-xRhxS.

AB - The effect of Rh substitution on the electronic structure of charge transfer type compound NiS is studied by XPS. We find the following results. (1) A narrow band is newly superimposed on the main peak (d8L) of NiS in the valence band region and its width increases with x. (2) The peak position and the line shape of Rh 3d core level spectra are very close to that of Rh metal. (3) The S 2s and the S 2P3/2 core level peaks shift toward higher binding energy (EB) with increasing x. (4) The Ni 2P 3/2 core level main peak (d9L) shifts toward lower E B with increasing x. (5) The EB separation of the Ni 2P3/2 main and satellite peaks decreases as x increases, while the relative intensity of the latter peak to the former one increases. We suggest a tentative model that a Mott-Hubbard type metallic d-band is superimposed on charge transfer type host NiS, and that this contribution is one of the electronic origin for dTt/dx<0 reported previously. The origin of the metallic band is attributed to the Rh-Rh and/or Ni-Rh interactions in Ni1-xRhxS.

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