Orbital-dependent band renormalization in BaNi2(As1−xPx)2 (x = 0.00 and 0.092)

Tomohiro Noda, Kazutaka Kudo, Masaya Takasuga, Minoru Nohara, Takuya Sugimoto, Daiki Ootsuki, Masaki Kobayashi, Koji Horiba, Kanta Ono, Hiroshi Kumigashira, Atsushi Fujimori, Naurang L. Saini, Takashi Mizokawa

    Research output: Contribution to journalArticle

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    Abstract

    We have studied the multi-band electronic structure of BaNi2(As1xPx)2 (x = 0.00 and 0.092) in which the P substitution suppresses unusual Ni–Ni zigzag bond order and induces strong coupling superconductivity. At x = 0.092, all the Fermi surfaces predicted by the ab-initio band calculations are successfully identified including the small electron pocket around the Z point. Interestingly, whereas the Ni 3d xy and x2 − y2 bands crossing EF agree with the band calculations, the Ni 3d yz=zx bands around 1 eV below the Fermi level (EF) are moderately renormalized similar to those in the Fe-based superconductors. The orbital-dependent band renormalization in BaNi2(As1xPx)2 indicates that the less correlated xy and x2 − y2 bands play important roles in the strong coupling superconductivity. Across the Ni–Ni bond order at x = 0.00, the less correlated Ni 3d xy and x2 − y2 bands near EF are selectively reconstructed across the Ni–Ni bond order. The band reconstruction is consistent with the orbital-selective Peierls instability proposed by Streltsov and Khomskii [Phys. Rev. B 89, 161112(R) (2014)], in which the itinerant orbital sector governs the structural instability and fluctuations.

    Original languageEnglish
    Article number064708
    JournalJournal of the Physical Society of Japan
    Volume86
    Issue number6
    DOIs
    Publication statusPublished - 2017 Jun 15

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    orbitals
    superconductivity
    Fermi surfaces
    sectors
    substitutes
    electronic structure
    electrons

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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    Orbital-dependent band renormalization in BaNi2(As1−xPx)2 (x = 0.00 and 0.092). / Noda, Tomohiro; Kudo, Kazutaka; Takasuga, Masaya; Nohara, Minoru; Sugimoto, Takuya; Ootsuki, Daiki; Kobayashi, Masaki; Horiba, Koji; Ono, Kanta; Kumigashira, Hiroshi; Fujimori, Atsushi; Saini, Naurang L.; Mizokawa, Takashi.

    In: Journal of the Physical Society of Japan, Vol. 86, No. 6, 064708, 15.06.2017.

    Research output: Contribution to journalArticle

    Noda, T, Kudo, K, Takasuga, M, Nohara, M, Sugimoto, T, Ootsuki, D, Kobayashi, M, Horiba, K, Ono, K, Kumigashira, H, Fujimori, A, Saini, NL & Mizokawa, T 2017, 'Orbital-dependent band renormalization in BaNi2(As1−xPx)2 (x = 0.00 and 0.092)', Journal of the Physical Society of Japan, vol. 86, no. 6, 064708. https://doi.org/10.7566/JPSJ.86.064708
    Noda, Tomohiro ; Kudo, Kazutaka ; Takasuga, Masaya ; Nohara, Minoru ; Sugimoto, Takuya ; Ootsuki, Daiki ; Kobayashi, Masaki ; Horiba, Koji ; Ono, Kanta ; Kumigashira, Hiroshi ; Fujimori, Atsushi ; Saini, Naurang L. ; Mizokawa, Takashi. / Orbital-dependent band renormalization in BaNi2(As1−xPx)2 (x = 0.00 and 0.092). In: Journal of the Physical Society of Japan. 2017 ; Vol. 86, No. 6.
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    AU - Noda, Tomohiro

    AU - Kudo, Kazutaka

    AU - Takasuga, Masaya

    AU - Nohara, Minoru

    AU - Sugimoto, Takuya

    AU - Ootsuki, Daiki

    AU - Kobayashi, Masaki

    AU - Horiba, Koji

    AU - Ono, Kanta

    AU - Kumigashira, Hiroshi

    AU - Fujimori, Atsushi

    AU - Saini, Naurang L.

    AU - Mizokawa, Takashi

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