2021/05/08 by Naoya Higashihara, Yoshihiko Okamoto, Yuma Yoshikawa +4
Materials Science · Physics and Astronomy · #2D Materials and Applications #Crystal structure #Crystallite #Doping #Electrical resistivity and conductivity #Iron-based superconductors research #Isostructural #Superconductivity #Ternary operation #Topological Materials and Phenomena #Transition metal #cond-mat.supr-con
paper · pdf · doi:10.7566/jpsj.90.063705
published as J. Phys. Soc. Jpn. 90, 063705 (2021) · 8 pages, 11 figures, J. Phys. Soc. Jpn., in press
arxiv created 2021/05/08 · openalex created_date 2021/05/10 · openalex publication_date 2021/05/25 · arxiv updated 2021/05/31 · openalex updated_date 2026/08/05
We report on the superconductivity in ternary transition metal tellurides Ta2Pd3Te5 and Nb2Pd3Te5, which have a one-dimensional crystal structure. Single-crystalline and polycrystalline samples of Ta2Pd3Te5 show nonmetallic electron conduction, while Ti or W doping results in metallic behavior with a bulk superconducting transition at 2-4 K. In contrast, the polycrystalline samples of Nb2Pd3Te5, which are found to be isostructural to Ta2Pd3Te5, show a bulk superconducting transition at 3.3 K. The crystal structure and physical properties of Ta2Pd3Te5 and Nb2Pd3Te5 are also discussed in comparison with a candidate excitonic insulator Ta2NiSe5.