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

We report the path from the charge density wave (CDW)-bearing superconductor CuIrTeto the metal insulator transition (MIT)-bearing compound CuIrSby chemical alloying with the gradual substitution of S for Te. The evolution of structural and physical properties of the CuIrTeS(0 ⩽⩽ 4) polycrystalline system is systemically examined. The x-ray diffraction (XRD) results imply CuIrTeS(0 ⩽⩽ 0.5) crystallizes in a NiAs defected trigonal structure, whereas it adapts to the cubic spinel structure for 3.6 ⩽⩽ 4 and it is a mixed phase in the doping range of 0.5 << 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= 0.2, and the CDW transition temperature enhances clearly asaugments for 0.2 ⩽⩽ 0.5. Besides, the superconducting critical temperature () first increases with S doping content and then decreases after reaching a maximum= 2.82 K for CuIrTeS. MIT order has been observed in the spinel region (3.6 ⩽⩽ 4) associated withincreasing withincreasing. Finally, the rich electronic phase diagram of temperature versusfor this CuIrTeSsystem 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 CuIrTeSchalcogenides.