Superconductivity at 4.4K in PdTe2-chains of a Ta Based Compound
Reena Goyal, Brajesh Tiwari, Rajveer Jha, and V. P. S Awana
TL;DR
This paper reports the discovery of bulk superconductivity at 4.4K in a layered Ta-based compound, Ta2Pd0.97Te6, with detailed structural and magnetic characterization.
Contribution
It is the first report of superconductivity in the Ta2Pd0.97Te6 compound, expanding the family of PdTe2-based superconductors with detailed synthesis and measurement data.
Findings
Superconductivity observed at 4.4K in Ta2Pd0.97Te6
Upper critical field determined to be 5.5 Tesla
Normal state exhibits Fermi-liquid behavior
Abstract
Superconductivity in PdTe2 heavy transition metal based compounds is rapidly developing field in condensed matter physics community. Here, we report superconductivity in a nominal ternary telluride Ta2Pd0.97Te6 compound, which is synthesized in sealed evacuated quartz ampoule. The resultant compound is crystallized in layered monoclinic Ta4Pd3Te16 phase with space group C2/m, having lattice parameters a=21.304(6)A, b=3.7365(7)A, and c=17.7330A with Beta =120.65(1)degree. Both transport and magnetic measurements demonstrated bulk superconductivity at 4.4K in studied polycrystalline sample. The metallic normal state conductivity can be well ascribed to Fermi-liquid behaviour. The superconducting upper critical field of the compound is determined to be 5.5Tesla based on magneto-restively measurements.
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