TY - JOUR
T1 - Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy
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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U2 - 10.1103/PhysRevB.101.165113
DO - 10.1103/PhysRevB.101.165113
M3 - Article
AN - SCOPUS:85085842288
SN - 2469-9950
VL - 101
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 16
M1 - 165113
ER -