Abstract
Superconductivity was discovered in (InSe(2))(x)NbSe(2). The materials are crystallized in a unique layered structure where bonded InSe(2) layers are intercalated into the van der Waals gaps of 2H-phase NbSe(2). The (InSe(2))(0.12)NbSe(2) superconductor exhibits a superconducting transition at 11.6 K and critical current density of 8.2 × 10(5) A/cm(2). Both values are the highest among all transition metal dichalcogenide superconductors at ambient pressure. The present finding provides an ideal material platform for further investigation of superconducting-related phenomena in transition metal dichalcogenides.