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arXiv · 2105.01886

Superconductivity in Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5

Naoya Higashihara·Yoshihiko Okamoto·Yuma Yoshikawa·Youichi Yamakawa·Hiroshi Takatsu·Hiroshi Kageyama·Koshi Takenaka
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Abstract

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.

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Naoya Higashihara, Yoshihiko Okamoto, Yuma Yoshikawa, Youichi Yamakawa, Hiroshi Takatsu, Hiroshi Kageyama, Koshi Takenaka. 2021-05-05. Superconductivity in Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5. https://doi.org/10.7566/jpsj.90.063705

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