Superconductivity in Pd-Intercalated Ternary Rare-Earth Polychalcogenide NdSeTe₂

【摘要】 We synthesize a set of Pd-doped polycrystalline samples PdxNdSeTe₂ and measure their physical properties.Compared with pure NdSeTe₂,the charge density wave（CDW） order is continuously suppressed with the Pdintercalation.Bulk superconductivity first appears at x=0.06 with T_c nearly 2.5K,coexisting with a CDW transition at 176 K.Further Pd-doping enhances T_c,until it reaches the maximum value 2.84 K at x=0.1,meanwhile the CDW transition vanishes.The upper critical field for the optimal doping sample Pd_0.1NdSeTe₂ is determined from the R-H measurement,which is estimated to be 0.6 T.These results provide another kind of ideal compound for studying the interplay between CDW and superconductivity systematically.更多还原

【Abstract】 We synthesize a set of Pd-doped polycrystalline samples PdxNdSeTe₂ and measure their physical properties.Compared with pure NdSeTe₂,the charge density wave（CDW） order is continuously suppressed with the Pdintercalation.Bulk superconductivity first appears at x=0.06 with T_c nearly 2.5K,coexisting with a CDW transition at 176 K.Further Pd-doping enhances T_c,until it reaches the maximum value 2.84 K at x=0.1,meanwhile the CDW transition vanishes.The upper critical field for the optimal doping sample Pd_0.1NdSeTe₂ is determined from the R-H measurement,which is estimated to be 0.6 T.These results provide another kind of ideal compound for studying the interplay between CDW and superconductivity systematically.更多还原