Abstract
We report bulk superconductivity at 1.0 K in a low-dimensional ternary telluride Ta3Pd3Te14 containing edge-sharing PdTe2 chains along crystallographic b axis, similar to the recently discovered superconductor Ta4Pd3Te16. The electronic heat capacity data show an obvious anomaly at the transition temperature, which indicates bulk superconductivity. The specific-heat jump is ΔC/(γnTc) ≈ 1.35, suggesting a weak coupling scenario. By measuring the low-temperature thermal conductivity, we conclude that Ta3Pd3Te14 is very likely a dirty s-wave superconductor. The emergence of superconductivity in Ta3Pd3Te14 with a lower Tc, compared to that of Ta4Pd3Te16, may be attributed to the lower density of states.
Highlights
We report bulk superconductivity at 1.0 K in a low-dimensional ternary telluride Ta3Pd3Te14 containing edge-sharing PdTe2 chains along crystallographic b axis, similar to the recently discovered superconductor Ta4Pd3Te16
If the Ta-based double octahedral chains are replaced by Ta-based single octahedral chains, the condensation of the three different types of chains would form the atomic layer of a new compound Ta3Pd3Te14, which was firstly synthesized by Liimatta and Ibers in 198921
The X-ray diffraction (XRD) pattern at 298 K by a conventional θ-2θ scan for the crystals lying on a sample holder is shown in Fig. 1(b), in which we can observe only multiple peaks arising from the diffraction from (1 0 1) planes, consistent with the layered crystal structure of Ta3Pd3Te14
Summary
We report bulk superconductivity at 1.0 K in a low-dimensional ternary telluride Ta3Pd3Te14 containing edge-sharing PdTe2 chains along crystallographic b axis, similar to the recently discovered superconductor Ta4Pd3Te16. A number of new superconductors with low dimensional structures, such as quasi-two-dimensional (Q2D) strontium ruthenate[2], ferroarsenides[3], bismuth oxysulfides[4], quasi-one-dimensional (Q1D) transition-metal chalcogenides[5], ternary tellurides[6,7], and newly discovered chromium-based compounds[8], were reported to display the features of novel SC. Owing to the inherent nature of transition metal chalcogenides[13], the low-dimensional structures and rich physical properties, e.g., density-wave instability[14], thermoelectricity[15], and SC5, are prevalent among them. Considering the close structural relationship of this material with the superconductor Ta4Pd3Te16, a natural question is whether the former is as well a superconductor
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
