• DOI:10.1088/1361-648X/ac594c
• Corpus ID: 247169519

Superconducting dome associated with the suppression and re-emergence of charge density wave states upon sulfur substitution in CuIr2Te4 chalcogenides

@article{Boubeche2022SuperconductingDA,
  title={Superconducting dome associated with the suppression and re-emergence of charge density wave states upon sulfur substitution in CuIr2Te4 chalcogenides},
  author={Mebrouka Boubeche and Ningning Wang and Jianping Sun and Pengtao Yang and Lingyong Zeng and Shaojuan Luo and Yiyi He and Jia Yu and Meng Wang and Jinguang Cheng and Huixia Luo},
  journal={Journal of Physics: Condensed Matter},
  year={2022},
  volume={34}
}

• M. Boubeche, Ningning Wang, +8 authors Huixia Luo
• Published 28 February 2022
• Materials Science
• Journal of Physics: Condensed Matter

We report the path from the charge density wave (CDW)-bearing superconductor CuIr2Te4 to the metal insulator transition (MIT)-bearing compound CuIr2S4 by chemical alloying with the gradual substitution of S for Te. The evolution of structural and physical properties of the CuIr2Te4−x S x (0 ⩽ x ⩽ 4) polycrystalline system is systemically examined. The x-ray diffraction (XRD) results imply CuIr2Te4−x S x (0 ⩽ x ⩽ 0.5) crystallizes in a NiAs defected trigonal structure, whereas it adapts to the cubic spinel structure for 3.6 ⩽ x ⩽ 4 and it is a mixed phase in the doping range of 0.5 < x < 3.6. Unexpectedly, the resistivity and magnetization measurements reveal that small-concentration S substitution for Te can suppress the CDW transition, but it reappears around x = 0.2, and the CDW transition temperature enhances clearly as x augments for 0.2 ⩽ x ⩽ 0.5. Besides, the superconducting critical temperature (T c) first increases with S doping content and then decreases after reaching a maximum T c = 2.82 K for CuIr2Te3.85S0.15. MIT order has been observed in the spinel region (3.6 ⩽ x ⩽ 4) associated with T MI increasing with x increasing. Finally, the rich electronic phase diagram of temperature versus x for this CuIr2Te4−x S x system is assembled, where the superconducting dome is associated with the suppression and re-emergence of CDW as well as MIT states at the end upon sulfur substitution in the CuIr2Te4−x S x chalcogenides.