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

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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 - Jun 15 2017

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orbitals
superconductivity
Fermi surfaces
sectors
substitutes
electronic structure
electrons

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  • 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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