Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1-xPtxTe2 revealed by resonant x-ray scattering

K. Takubo, K. Yamamoto, Y. Hirata, H. Wadati, Takashi Mizokawa, R. Sutarto, F. He, K. Ishii, Y. Yamasaki, H. Nakao, Y. Murakami, G. Matsuo, H. Ishii, M. Kobayashi, K. Kudo, M. Nohara

    Research output: Contribution to journalArticle

    Abstract

    The electronic-structural modulations of Ir1-xPtxTe2 (0x0.12) have been examined by resonant elastic x-ray scattering (REXS) and resonant inelastic x-ray scattering (RIXS) techniques at both the Ir and Te edges. Charge-density-wave-like superstructures with wave vectors of Q=(1/50-1/5), (1/80-1/8), and (1/60-1/6) are observed on the same sample of IrTe2 at the lowest temperature, the patterns of which are controlled by the cooling speeds. In contrast, superstructures around Q=(1/50-1/5) are observed for doped samples (0.02x0.05). The superstructure reflections persist to higher Pt substitution than previously assumed, demonstrating that a charge-density wave (CDW) can coexist with superconductivity. The analysis of the energy-dependent REXS and RIXS line shape reveals the importance of the Te 5p state rather than the Ir 5d states in the formation of the spatial modulation of these systems. The phase diagram reexamined in this work suggests that the CDW incommensurability may correlate with the emergence of superconducting states such as CuxTiSe2 and LixTaS2.

    Original languageEnglish
    Article number205142
    JournalPhysical Review B
    Volume97
    Issue number20
    DOIs
    Publication statusPublished - 2018 May 31

    Fingerprint

    Domes
    x ray scattering
    domes
    Charge density waves
    Scattering
    X rays
    elastic scattering
    inelastic scattering
    Modulation
    modulation
    Superconductivity
    Phase diagrams
    line shape
    Substitution reactions
    superconductivity
    phase diagrams
    substitutes
    Cooling
    cooling
    electronics

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1-xPtxTe2 revealed by resonant x-ray scattering. / Takubo, K.; Yamamoto, K.; Hirata, Y.; Wadati, H.; Mizokawa, Takashi; Sutarto, R.; He, F.; Ishii, K.; Yamasaki, Y.; Nakao, H.; Murakami, Y.; Matsuo, G.; Ishii, H.; Kobayashi, M.; Kudo, K.; Nohara, M.

    In: Physical Review B, Vol. 97, No. 20, 205142, 31.05.2018.

    Research output: Contribution to journalArticle

    Takubo, K, Yamamoto, K, Hirata, Y, Wadati, H, Mizokawa, T, Sutarto, R, He, F, Ishii, K, Yamasaki, Y, Nakao, H, Murakami, Y, Matsuo, G, Ishii, H, Kobayashi, M, Kudo, K & Nohara, M 2018, 'Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1-xPtxTe2 revealed by resonant x-ray scattering', Physical Review B, vol. 97, no. 20, 205142. https://doi.org/10.1103/PhysRevB.97.205142
    Takubo, K. ; Yamamoto, K. ; Hirata, Y. ; Wadati, H. ; Mizokawa, Takashi ; Sutarto, R. ; He, F. ; Ishii, K. ; Yamasaki, Y. ; Nakao, H. ; Murakami, Y. ; Matsuo, G. ; Ishii, H. ; Kobayashi, M. ; Kudo, K. ; Nohara, M. / Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1-xPtxTe2 revealed by resonant x-ray scattering. In: Physical Review B. 2018 ; Vol. 97, No. 20.
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    abstract = "The electronic-structural modulations of Ir1-xPtxTe2 (0x0.12) have been examined by resonant elastic x-ray scattering (REXS) and resonant inelastic x-ray scattering (RIXS) techniques at both the Ir and Te edges. Charge-density-wave-like superstructures with wave vectors of Q=(1/50-1/5), (1/80-1/8), and (1/60-1/6) are observed on the same sample of IrTe2 at the lowest temperature, the patterns of which are controlled by the cooling speeds. In contrast, superstructures around Q=(1/50-1/5) are observed for doped samples (0.02x0.05). The superstructure reflections persist to higher Pt substitution than previously assumed, demonstrating that a charge-density wave (CDW) can coexist with superconductivity. The analysis of the energy-dependent REXS and RIXS line shape reveals the importance of the Te 5p state rather than the Ir 5d states in the formation of the spatial modulation of these systems. The phase diagram reexamined in this work suggests that the CDW incommensurability may correlate with the emergence of superconducting states such as CuxTiSe2 and LixTaS2.",
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    AU - Wadati, H.

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    AU - Matsuo, G.

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    AB - The electronic-structural modulations of Ir1-xPtxTe2 (0x0.12) have been examined by resonant elastic x-ray scattering (REXS) and resonant inelastic x-ray scattering (RIXS) techniques at both the Ir and Te edges. Charge-density-wave-like superstructures with wave vectors of Q=(1/50-1/5), (1/80-1/8), and (1/60-1/6) are observed on the same sample of IrTe2 at the lowest temperature, the patterns of which are controlled by the cooling speeds. In contrast, superstructures around Q=(1/50-1/5) are observed for doped samples (0.02x0.05). The superstructure reflections persist to higher Pt substitution than previously assumed, demonstrating that a charge-density wave (CDW) can coexist with superconductivity. The analysis of the energy-dependent REXS and RIXS line shape reveals the importance of the Te 5p state rather than the Ir 5d states in the formation of the spatial modulation of these systems. The phase diagram reexamined in this work suggests that the CDW incommensurability may correlate with the emergence of superconducting states such as CuxTiSe2 and LixTaS2.

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