X-Ray Photoemission Spectroscopic Study on the Electronic States in the Mixed System between Charge-Transfer and Mott-Hubbard Type Metals: Co0.91S and V0.91S

Teruki Motohashi; Keiso Hayashi; Masanori Matoba; Shuichiro Anzai; Atsushi Fujimori

doi:10.1143/JPSJ.65.1312

X-Ray Photoemission Spectroscopic Study on the Electronic States in the Mixed System between Charge-Transfer and Mott-Hubbard Type Metals: Co_0.91S and V_0.91S

Teruki Motohashi, Keiso Hayashi, Masanori Matoba, Shuichiro Anzai, Atsushi Fujimori

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In order to study the change of the electronic states from the charge-transfer(CT) type metal to the Mott-Hubbard(MH) one, X-ray photoemission spectra are measured on the NiAs-type (Co_1-xV_x)_0.91S (x ≤ 0.50) and V_0.91S. The asymmetry parameter α for S 2s and 2p core level spectra decrease with increasing x. This result indicates that the local density of states of S atoms at the Fermi level decreases as x increases; the system changes from the CT-type metal to the MH-one with x. The change in V 2p line shape with x suggests the possibility of the considerable hybridization between V 3d and S 3p in (Co_1-xV_x)_0.91S at lower x region. This feature would be related to the appearance of the extra peak at binding energy E_B = 2-3 eV in the valence band X-ray photoemission spectra.

Original language	English
Pages (from-to)	1312-1316
Number of pages	5
Journal	Journal of the Physical Society of Japan
Volume	65
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.65.1312
Publication status	Published - 1996 Jan 1

Keywords

(CoV)S
Asymmetry parameter α
Charge-transfer type metal
Local density of states
Mott-hubbard type metal
XPS

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.65.1312

Cite this

X-Ray Photoemission Spectroscopic Study on the Electronic States in the Mixed System between Charge-Transfer and Mott-Hubbard Type Metals: Co_0.91S and V_0.91S. / Motohashi, Teruki; Hayashi, Keiso; Matoba, Masanori et al.
In: Journal of the Physical Society of Japan, Vol. 65, No. 5, 01.01.1996, p. 1312-1316.

Research output: Contribution to journal › Article › peer-review

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abstract = "In order to study the change of the electronic states from the charge-transfer(CT) type metal to the Mott-Hubbard(MH) one, X-ray photoemission spectra are measured on the NiAs-type (Co1-xVx)0.91S (x ≤ 0.50) and V0.91S. The asymmetry parameter α for S 2s and 2p core level spectra decrease with increasing x. This result indicates that the local density of states of S atoms at the Fermi level decreases as x increases; the system changes from the CT-type metal to the MH-one with x. The change in V 2p line shape with x suggests the possibility of the considerable hybridization between V 3d and S 3p in (Co1-xVx)0.91S at lower x region. This feature would be related to the appearance of the extra peak at binding energy EB = 2-3 eV in the valence band X-ray photoemission spectra.",

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AU - Matoba, Masanori

AU - Anzai, Shuichiro

AU - Fujimori, Atsushi

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AB - In order to study the change of the electronic states from the charge-transfer(CT) type metal to the Mott-Hubbard(MH) one, X-ray photoemission spectra are measured on the NiAs-type (Co1-xVx)0.91S (x ≤ 0.50) and V0.91S. The asymmetry parameter α for S 2s and 2p core level spectra decrease with increasing x. This result indicates that the local density of states of S atoms at the Fermi level decreases as x increases; the system changes from the CT-type metal to the MH-one with x. The change in V 2p line shape with x suggests the possibility of the considerable hybridization between V 3d and S 3p in (Co1-xVx)0.91S at lower x region. This feature would be related to the appearance of the extra peak at binding energy EB = 2-3 eV in the valence band X-ray photoemission spectra.

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