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

^*Corresponding author for this work

School of Advanced Science and Engineering

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

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	11-20
Number of pages	10
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	223
DOIs	https://doi.org/10.1016/j.elspec.2017.12.002
Publication status	Published - 2018 Feb

Keywords

Charge fluctuation
Peak fittings
Surface electronic properties
V Bond ordering
V Charge ordering/fluctuation
XPS

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

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10.1016/j.elspec.2017.12.002

Cite this

@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",

}

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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DO - 10.1016/j.elspec.2017.12.002

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JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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Cite this

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this

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