CuIr2Te4: A Quasi-Two-Dimensional Ternary Telluride Chalcogenide Superconductor

Abstract

Here we report the first observation of superconductivity in the AB2X4-type ternary telluride CuIr2Te4, which is synthesized by a solid-state method in an evacuated quartz jacket. It adopts a disordered trigonal structure with space group P3m1 (No. 164), which embodies a two-dimensional IrTe2 layers and intercalated by Cu between the layers. We use a combination of experimental and first principles calculation analysis to look insight into the structural and physical properties. CuIr2Te4 consistently exhibited a bulk superconductivity transition at 2.5 K in electrical resistivity, magnetic susceptibility and specific heat measurements. Resistivity and magnetization measurements suggest a charge density wave transition (TCDW = 250 K) coexists in CuIr2Te4, which further signify the coexistence of superconductivity and CDW in the ternary telluride chalcogenide CuIr2Te4. Our discovery of the new CDW-bearing superconductor CuIr2Te4 opens a door for experimental and theoretical studies of the interplay between CDW and superconductivity quantum state in the condensed matter field.

arXiv comment25 pages, 6 figures, 2 tables

References in corpus (2)

• Origin of the phase transition in IrTe2: structural modulation and local bonding instability
• Superconductivity in the Cu(Ir1-xPtx)2Se4 Spinel

Cited by in corpus (7)

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• Charge density wave and superconductivity in the family of telluride chalcogenides Zn1-xCuxIr2-yN(N = Al, Ti, Rh)yTe4
• Evidence of unconventional pairing in the quasi two-dimensional CuIr${}_2$Te${}_4$ superconductor
• Superconductivity in CuIr2-xAlxTe4 telluride chalcogenides
• Modulating the electronic and optical properties of a ternary chalcogenide CdTl2Te4 via external electric field: A DFT study