Pd₃Te₂: an s-wave superconductor with Pd atom coordinated by five Te atoms

Abstract

We have identified a new superconductor Pd 3 Te 2 based on pure phase samples. Electrical resistivity, magnetic susceptibility and specific heat measurements confirm that Pd 3 Te 2 is a bulk superconductor at 2.2 K. The value of Ginzburg-Landau parameter is larger than 1/√2, suggesting type-II superconductivity. Meanwhile, the analysis of specific heat indicates that Pd 3 Te 2 is a fully-gapped superconductor with electron-phonon coupling constant λ e-p =0.58, which features a BCS weakly coupling case. According to our theoretical calculations, the superconductivity is related to the states of hybridization of Pd d states and Te p states at the Fermi level. Our results reveal that superconductivity can occur in five coordinated palladium tellurides.

FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains

“…Its crystal structure was solved through the refinement of single crystal XRD described in the Experimental Section and identified as a new prototype structure. We have also checked possible structural similarities with other known compounds such as superconductor Pd 3 Te 2 , 25 but there are fundamental differences including the crystal system, space group, and lattice constants. As shown in Figure 1a, FePd 2 Te 2 adopts monoclinic symmetry with space group P2 1 /m (No.…”