  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.
