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, T. Mizokawa, R. Sutarto, F. He, K. Ishii, Y. Yamasaki, H. Nakao, Y. Murakami, G. Matsuo, H. Ishii, M. Kobayashi, Kazutaka Kudo, Minoru 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 - May 31 2018

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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, T.; Sutarto, R.; He, F.; Ishii, K.; Yamasaki, Y.; Nakao, H.; Murakami, Y.; Matsuo, G.; Ishii, H.; Kobayashi, M.; Kudo, Kazutaka; Nohara, Minoru.

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, T. ; Sutarto, R. ; He, F. ; Ishii, K. ; Yamasaki, Y. ; Nakao, H. ; Murakami, Y. ; Matsuo, G. ; Ishii, H. ; Kobayashi, M. ; Kudo, Kazutaka ; Nohara, Minoru. / 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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