Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy

T. Yoshino, M. Okawa, Tomomasa Kajita, S. Dash, R. Shimoyama, K. Takahashi, Y. Takahashi, R. Takayanagi, T. Saitoh, D. Ootsuki, T. Yoshida, E. Ikenaga, N. L. Saini, Takuro Katsufuji, Takashi Mizokawa

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    We have studied the electronic structure of BaV10O15 across the metal-insulator transition with V trimerization by means of hard-x-ray photoemission spectroscopy (HAXPES) and mean-field calculations. The V 2p HAXPES indicates V2.5+-V3+ charge fluctuation in the metallic phase, and V2+-V3+ charge order in the insulating phase. The V2.5+-V3+ charge fluctuation is consistent with the mean-field solution where a V 3d a1g electron is shared by two V sites with face-sharing VO6 octahedra. The valence-band HAXPES of the metallic phase exhibits pseudogap opening at the Fermi level associated with the charge fluctuation, and a band gap ∼200 meV is established in the insulating phase due to the switching of charge correlation.

    Original languageEnglish
    Article number075151
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume95
    Issue number7
    DOIs
    Publication statusPublished - 2017 Feb 27

    Fingerprint

    Metal insulator transition
    Photoelectron spectroscopy
    photoelectric emission
    insulators
    valence
    X rays
    metals
    spectroscopy
    x rays
    Valence bands
    Fermi level
    Electronic structure
    Energy gap
    electronic structure
    Electrons
    electrons

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy. / Yoshino, T.; Okawa, M.; Kajita, Tomomasa; Dash, S.; Shimoyama, R.; Takahashi, K.; Takahashi, Y.; Takayanagi, R.; Saitoh, T.; Ootsuki, D.; Yoshida, T.; Ikenaga, E.; Saini, N. L.; Katsufuji, Takuro; Mizokawa, Takashi.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 95, No. 7, 075151, 27.02.2017.

    Research output: Contribution to journalArticle

    Yoshino, T, Okawa, M, Kajita, T, Dash, S, Shimoyama, R, Takahashi, K, Takahashi, Y, Takayanagi, R, Saitoh, T, Ootsuki, D, Yoshida, T, Ikenaga, E, Saini, NL, Katsufuji, T & Mizokawa, T 2017, 'Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 95, no. 7, 075151. https://doi.org/10.1103/PhysRevB.95.075151
    Yoshino, T. ; Okawa, M. ; Kajita, Tomomasa ; Dash, S. ; Shimoyama, R. ; Takahashi, K. ; Takahashi, Y. ; Takayanagi, R. ; Saitoh, T. ; Ootsuki, D. ; Yoshida, T. ; Ikenaga, E. ; Saini, N. L. ; Katsufuji, Takuro ; Mizokawa, Takashi. / Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2017 ; Vol. 95, No. 7.
    @article{58cb4fb400984a0ba32f25873adf5963,
    title = "Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy",
    abstract = "We have studied the electronic structure of BaV10O15 across the metal-insulator transition with V trimerization by means of hard-x-ray photoemission spectroscopy (HAXPES) and mean-field calculations. The V 2p HAXPES indicates V2.5+-V3+ charge fluctuation in the metallic phase, and V2+-V3+ charge order in the insulating phase. The V2.5+-V3+ charge fluctuation is consistent with the mean-field solution where a V 3d a1g electron is shared by two V sites with face-sharing VO6 octahedra. The valence-band HAXPES of the metallic phase exhibits pseudogap opening at the Fermi level associated with the charge fluctuation, and a band gap ∼200 meV is established in the insulating phase due to the switching of charge correlation.",
    author = "T. Yoshino and M. Okawa and Tomomasa Kajita and S. Dash and R. Shimoyama and K. Takahashi and Y. Takahashi and R. Takayanagi and T. Saitoh and D. Ootsuki and T. Yoshida and E. Ikenaga and Saini, {N. L.} and Takuro Katsufuji and Takashi Mizokawa",
    year = "2017",
    month = "2",
    day = "27",
    doi = "10.1103/PhysRevB.95.075151",
    language = "English",
    volume = "95",
    journal = "Physical Review B-Condensed Matter",
    issn = "0163-1829",
    publisher = "American Institute of Physics Publising LLC",
    number = "7",

    }

    TY - JOUR

    T1 - Unusual valence state and metal-insulator transition in BaV10 O15 probed by hard x-ray photoemission spectroscopy

    AU - Yoshino, T.

    AU - Okawa, M.

    AU - Kajita, Tomomasa

    AU - Dash, S.

    AU - Shimoyama, R.

    AU - Takahashi, K.

    AU - Takahashi, Y.

    AU - Takayanagi, R.

    AU - Saitoh, T.

    AU - Ootsuki, D.

    AU - Yoshida, T.

    AU - Ikenaga, E.

    AU - Saini, N. L.

    AU - Katsufuji, Takuro

    AU - Mizokawa, Takashi

    PY - 2017/2/27

    Y1 - 2017/2/27

    N2 - We have studied the electronic structure of BaV10O15 across the metal-insulator transition with V trimerization by means of hard-x-ray photoemission spectroscopy (HAXPES) and mean-field calculations. The V 2p HAXPES indicates V2.5+-V3+ charge fluctuation in the metallic phase, and V2+-V3+ charge order in the insulating phase. The V2.5+-V3+ charge fluctuation is consistent with the mean-field solution where a V 3d a1g electron is shared by two V sites with face-sharing VO6 octahedra. The valence-band HAXPES of the metallic phase exhibits pseudogap opening at the Fermi level associated with the charge fluctuation, and a band gap ∼200 meV is established in the insulating phase due to the switching of charge correlation.

    AB - We have studied the electronic structure of BaV10O15 across the metal-insulator transition with V trimerization by means of hard-x-ray photoemission spectroscopy (HAXPES) and mean-field calculations. The V 2p HAXPES indicates V2.5+-V3+ charge fluctuation in the metallic phase, and V2+-V3+ charge order in the insulating phase. The V2.5+-V3+ charge fluctuation is consistent with the mean-field solution where a V 3d a1g electron is shared by two V sites with face-sharing VO6 octahedra. The valence-band HAXPES of the metallic phase exhibits pseudogap opening at the Fermi level associated with the charge fluctuation, and a band gap ∼200 meV is established in the insulating phase due to the switching of charge correlation.

    UR - http://www.scopus.com/inward/record.url?scp=85014533877&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85014533877&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevB.95.075151

    DO - 10.1103/PhysRevB.95.075151

    M3 - Article

    AN - SCOPUS:85014533877

    VL - 95

    JO - Physical Review B-Condensed Matter

    JF - Physical Review B-Condensed Matter

    SN - 0163-1829

    IS - 7

    M1 - 075151

    ER -