Superconductivity in platinum-intercalated 2H-TaS2

Abstract

We systematically investigated the superconducting properties of 2H-Pt_xTaS₂ (0 ≤ x ≤ 0.12). As the platinum (Pt) content increases, the charge density wave (CDW) in 2H-TaS₂, which appears at approximately 75 K, is progressively suppressed and completely disappears in 2H-Pt_0.06TaS₂. Meanwhile, the superconducting transition temperature (T_c) first increases and then decreases, reaching its maximum value of approximately 4.85 K at x = 0.06. This phenomenon suggests a competitive interplay between CDW and superconductivity (SC) in this system. Further measurements of the superconducting parameters of 2H-Pt_0.06TaS₂ indicate that the enhancement of T_c is primarily attributed to an increase in the density of states at the Fermi level.