Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy

Daiki Ootsuki; Kei Sawada; Hiroki Goto; Daigorou Hirai; Daisuke Shibata; Masato Kawamoto; Akira Yasui; Eiji Ikenaga; Masashi Arita; Hirofumi Namatame; Masaki Taniguchi; Tatsuya Toriyama; Takehisa Konishi; Yukinori Ohta; Naurang L. Saini; Teppei Yoshida; Takashi Mizokawa; Hidenori Takagi

doi:10.1103/PhysRevB.101.165113

Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy

Daiki Ootsuki, Kei Sawada, Hiroki Goto, Daigorou Hirai, Daisuke Shibata, Masato Kawamoto, Akira Yasui, Eiji Ikenaga, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Tatsuya Toriyama, Takehisa Konishi, Yukinori Ohta, Naurang L. Saini, Teppei Yoshida, Takashi Mizokawa, Hidenori Takagi

School of Advanced Science and Engineering

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

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Abstract

We investigate the metal to nonmagnetic insulator (MI) transition of MnP-type Ru pnictide RuP using hard x-ray and ultraviolet photoemission spectroscopies. The spectral weight at EF is suppressed below the MI transition temperature TMI, while there is no appreciable change across the pseudogap temperature TPG. The estimated energy scale of the gap is ∼110 meV, which is in good correspondence to the spin gap opening observed in the previous NMR study. According to the band structure calculation, the density of states at EF mainly originates from narrow bands of the Ru 4dxy orbitals. Our results suggest that the fourfold-degenerate Ru 4dxy orbitals are deeply related to the MI transition. Based on the photoemission results and the band structure calculation, we argue the possible origin of the MI transition for polycrystalline RuP.

Original language	English
Article number	165113
Journal	Physical Review B
Volume	101
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.101.165113
Publication status	Published - 2020 Apr 15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Ootsuki, D., Sawada, K., Goto, H., Hirai, D., Shibata, D., Kawamoto, M., Yasui, A., Ikenaga, E., Arita, M., Namatame, H., Taniguchi, M., Toriyama, T., Konishi, T., Ohta, Y., Saini, N. L., Yoshida, T., Mizokawa, T., & Takagi, H. (2020). Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy. Physical Review B, 101(16), Article 165113. https://doi.org/10.1103/PhysRevB.101.165113

Ootsuki, D, Sawada, K, Goto, H, Hirai, D, Shibata, D, Kawamoto, M, Yasui, A, Ikenaga, E, Arita, M, Namatame, H, Taniguchi, M, Toriyama, T, Konishi, T, Ohta, Y, Saini, NL, Yoshida, T, Mizokawa, T & Takagi, H 2020, 'Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy', Physical Review B, vol. 101, no. 16, 165113. https://doi.org/10.1103/PhysRevB.101.165113

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title = "Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy",

abstract = "We investigate the metal to nonmagnetic insulator (MI) transition of MnP-type Ru pnictide RuP using hard x-ray and ultraviolet photoemission spectroscopies. The spectral weight at EF is suppressed below the MI transition temperature TMI, while there is no appreciable change across the pseudogap temperature TPG. The estimated energy scale of the gap is ∼110 meV, which is in good correspondence to the spin gap opening observed in the previous NMR study. According to the band structure calculation, the density of states at EF mainly originates from narrow bands of the Ru 4dxy orbitals. Our results suggest that the fourfold-degenerate Ru 4dxy orbitals are deeply related to the MI transition. Based on the photoemission results and the band structure calculation, we argue the possible origin of the MI transition for polycrystalline RuP.",

author = "Daiki Ootsuki and Kei Sawada and Hiroki Goto and Daigorou Hirai and Daisuke Shibata and Masato Kawamoto and Akira Yasui and Eiji Ikenaga and Masashi Arita and Hirofumi Namatame and Masaki Taniguchi and Tatsuya Toriyama and Takehisa Konishi and Yukinori Ohta and Saini, {Naurang L.} and Teppei Yoshida and Takashi Mizokawa and Hidenori Takagi",

note = "Funding Information: The synchrotron radiation experiments were performed with the approval of HSRC (Proposal No. 14-A-13) and SPring-8 (Proposal No. 2017A1406). D.O., D.S., and T.T. acknowledge support from the JSPS Research Fellowship for Young Scientists. This research is supported by Grants-in-Aid for Scientific Research from the JSPS KAKENHI (Grants No. JP16K05445, No. JP17K05530, and No. JP17H06136), the Kyoto University Research Funds for Young Scientists (Start-Up), and the Kyoto University Foundation. Publisher Copyright: {\textcopyright} 2020 American Physical Society. {\textcopyright}2020 American Physical Society.",

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doi = "10.1103/PhysRevB.101.165113",

language = "English",

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AU - Ootsuki, Daiki

AU - Sawada, Kei

AU - Goto, Hiroki

AU - Hirai, Daigorou

AU - Shibata, Daisuke

AU - Kawamoto, Masato

AU - Yasui, Akira

AU - Ikenaga, Eiji

AU - Arita, Masashi

AU - Namatame, Hirofumi

AU - Taniguchi, Masaki

AU - Toriyama, Tatsuya

AU - Konishi, Takehisa

AU - Ohta, Yukinori

AU - Saini, Naurang L.

AU - Yoshida, Teppei

AU - Mizokawa, Takashi

AU - Takagi, Hidenori

N1 - Funding Information: The synchrotron radiation experiments were performed with the approval of HSRC (Proposal No. 14-A-13) and SPring-8 (Proposal No. 2017A1406). D.O., D.S., and T.T. acknowledge support from the JSPS Research Fellowship for Young Scientists. This research is supported by Grants-in-Aid for Scientific Research from the JSPS KAKENHI (Grants No. JP16K05445, No. JP17K05530, and No. JP17H06136), the Kyoto University Research Funds for Young Scientists (Start-Up), and the Kyoto University Foundation. Publisher Copyright: © 2020 American Physical Society. ©2020 American Physical Society.

PY - 2020/4/15

Y1 - 2020/4/15

N2 - We investigate the metal to nonmagnetic insulator (MI) transition of MnP-type Ru pnictide RuP using hard x-ray and ultraviolet photoemission spectroscopies. The spectral weight at EF is suppressed below the MI transition temperature TMI, while there is no appreciable change across the pseudogap temperature TPG. The estimated energy scale of the gap is ∼110 meV, which is in good correspondence to the spin gap opening observed in the previous NMR study. According to the band structure calculation, the density of states at EF mainly originates from narrow bands of the Ru 4dxy orbitals. Our results suggest that the fourfold-degenerate Ru 4dxy orbitals are deeply related to the MI transition. Based on the photoemission results and the band structure calculation, we argue the possible origin of the MI transition for polycrystalline RuP.

AB - We investigate the metal to nonmagnetic insulator (MI) transition of MnP-type Ru pnictide RuP using hard x-ray and ultraviolet photoemission spectroscopies. The spectral weight at EF is suppressed below the MI transition temperature TMI, while there is no appreciable change across the pseudogap temperature TPG. The estimated energy scale of the gap is ∼110 meV, which is in good correspondence to the spin gap opening observed in the previous NMR study. According to the band structure calculation, the density of states at EF mainly originates from narrow bands of the Ru 4dxy orbitals. Our results suggest that the fourfold-degenerate Ru 4dxy orbitals are deeply related to the MI transition. Based on the photoemission results and the band structure calculation, we argue the possible origin of the MI transition for polycrystalline RuP.

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Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy

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