V 2p core-level spectroscopy of V2+/V3+ mixed valence AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18

S. Dash; T. Kajita; T. Yoshino; N. L. Saini; T. Katsufuji; T. Mizokawa

doi:10.1016/j.elspec.2017.12.002

V 2p core-level spectroscopy of V²⁺/V³⁺ mixed valence AV₁₀O₁₅ (A = Ba, Sr) and Ba_0.9Sr_0.1V₁₃O₁₈

S. Dash^*, T. Kajita, T. Yoshino, N. L. Saini, T. Katsufuji, T. Mizokawa

^*この研究の対応する著者

先進理工学部

研究成果: Article › 査読

6 被引用数 (Scopus)

抄録

We have studied the surface electronic structure of AV₁₀O₁₅ (A = Ba, Sr) and Ba_0.9Sr_0.1V₁₃O₁₈ by using x-ray photoemission spectroscopy (XPS). The V 2p XPS shows multiple peaks associated with the charge fluctuation in the system. The relative intensity of each valence component can be extracted by Gaussian and Voigt fittings. The result strongly depends on the number of Gaussians/Voigts. In BaV₁₀O₁₅ and Ba_0.9Sr_0.1V₁₃O₁₈, the surface state has more V³⁺ than the bulk. In addition to the presence of surface V³⁺, the V^2.5+ in AV₁₀O₁₅ (A = Ba, Sr) and V²⁺ in Ba_0.9Sr_0.1V₁₃O₁₈ systems are observed even in the surface sensitive XPS. The number of Gaussians/Voigts should be as large as four for the V 2p_3/2, in order to obtain the results consistent with the bulk sensitive HAXPES study.

本文言語	English
ページ（範囲）	11-20
ページ数	10
ジャーナル	Journal of Electron Spectroscopy and Related Phenomena
巻	223
DOI	https://doi.org/10.1016/j.elspec.2017.12.002
出版ステータス	Published - 2018 2月

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
放射線
原子分子物理学および光学
凝縮系物理学
分光学
物理化学および理論化学

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10.1016/j.elspec.2017.12.002

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@article{f82f836dddaf4bb0a5f511ca64253aa1,

title = "V 2p core-level spectroscopy of V2+/V3+ mixed valence AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18",

abstract = "We have studied the surface electronic structure of AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18 by using x-ray photoemission spectroscopy (XPS). The V 2p XPS shows multiple peaks associated with the charge fluctuation in the system. The relative intensity of each valence component can be extracted by Gaussian and Voigt fittings. The result strongly depends on the number of Gaussians/Voigts. In BaV10O15 and Ba0.9Sr0.1V13O18, the surface state has more V3+ than the bulk. In addition to the presence of surface V3+, the V2.5+ in AV10O15 (A = Ba, Sr) and V2+ in Ba0.9Sr0.1V13O18 systems are observed even in the surface sensitive XPS. The number of Gaussians/Voigts should be as large as four for the V 2p3/2, in order to obtain the results consistent with the bulk sensitive HAXPES study.",

keywords = "Charge fluctuation, Peak fittings, Surface electronic properties, V Bond ordering, V Charge ordering/fluctuation, XPS",

author = "S. Dash and T. Kajita and T. Yoshino and Saini, {N. L.} and T. Katsufuji and T. Mizokawa",

note = "Funding Information: This work was supported by CREST-JST (JPMJCR15Q2), Japan . Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = feb,

doi = "10.1016/j.elspec.2017.12.002",

language = "English",

volume = "223",

pages = "11--20",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier",

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TY - JOUR

T1 - V 2p core-level spectroscopy of V2+/V3+ mixed valence AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18

AU - Dash, S.

AU - Kajita, T.

AU - Yoshino, T.

AU - Saini, N. L.

AU - Katsufuji, T.

AU - Mizokawa, T.

PY - 2018/2

Y1 - 2018/2

N2 - We have studied the surface electronic structure of AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18 by using x-ray photoemission spectroscopy (XPS). The V 2p XPS shows multiple peaks associated with the charge fluctuation in the system. The relative intensity of each valence component can be extracted by Gaussian and Voigt fittings. The result strongly depends on the number of Gaussians/Voigts. In BaV10O15 and Ba0.9Sr0.1V13O18, the surface state has more V3+ than the bulk. In addition to the presence of surface V3+, the V2.5+ in AV10O15 (A = Ba, Sr) and V2+ in Ba0.9Sr0.1V13O18 systems are observed even in the surface sensitive XPS. The number of Gaussians/Voigts should be as large as four for the V 2p3/2, in order to obtain the results consistent with the bulk sensitive HAXPES study.

AB - We have studied the surface electronic structure of AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18 by using x-ray photoemission spectroscopy (XPS). The V 2p XPS shows multiple peaks associated with the charge fluctuation in the system. The relative intensity of each valence component can be extracted by Gaussian and Voigt fittings. The result strongly depends on the number of Gaussians/Voigts. In BaV10O15 and Ba0.9Sr0.1V13O18, the surface state has more V3+ than the bulk. In addition to the presence of surface V3+, the V2.5+ in AV10O15 (A = Ba, Sr) and V2+ in Ba0.9Sr0.1V13O18 systems are observed even in the surface sensitive XPS. The number of Gaussians/Voigts should be as large as four for the V 2p3/2, in order to obtain the results consistent with the bulk sensitive HAXPES study.

KW - Charge fluctuation

KW - Peak fittings

KW - Surface electronic properties

KW - V Bond ordering

KW - V Charge ordering/fluctuation

KW - XPS

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ER -

V 2p core-level spectroscopy of V2+/V3+ mixed valence AV10O15 (A = Ba, Sr) and Ba0.9Sr0.1V13O18

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ASJC Scopus subject areas

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V 2p core-level spectroscopy of V²⁺/V³⁺ mixed valence AV₁₀O₁₅ (A = Ba, Sr) and Ba_0.9Sr_0.1V₁₃O₁₈