Tetragonality induced superconductivity in anti-ThCr2Si2-type: RE 2O2Bi (RE = rare earth) with Bi square nets

Ryosuke Sei, Hideyuki Kawasoko, Kota Matsumoto, Masato Arimitsu, Kyohei Terakado, Daichi Oka, Shintaro Fukuda, Noriaki Kimura, Hidetaka Kasai, Eiji Nishibori, Kenji Ohoyama, Akinori Hoshikawa, Toru Ishigaki, Tetsuya Hasegawa, Tomoteru Fukumura

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Abstract

We report a series of layered superconductors, anti-ThCr2Si2-type RE2O2Bi (RE = rare earth), composed of electrically conductive Bi square nets and magnetic insulating RE2O2 layers. Superconductivity was induced by separating the Bi square nets as a result of excess oxygen incorporation, irrespective of the presence of magnetic ordering in RE2O2 layers. Intriguingly, the transition temperature of all RE2O2Bi including nonmagnetic Y2O2Bi was approximately scaled by unit cell tetragonality (c/a), implying a key role in the relative separation of the Bi square nets to induce superconductivity.

Original languageEnglish
Pages (from-to)3321-3325
Number of pages5
JournalDalton Transactions
Volume49
Issue number10
DOIs
Publication statusPublished - 2020 Mar 14

ASJC Scopus subject areas

  • Inorganic Chemistry

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    Sei, R., Kawasoko, H., Matsumoto, K., Arimitsu, M., Terakado, K., Oka, D., Fukuda, S., Kimura, N., Kasai, H., Nishibori, E., Ohoyama, K., Hoshikawa, A., Ishigaki, T., Hasegawa, T., & Fukumura, T. (2020). Tetragonality induced superconductivity in anti-ThCr2Si2-type: RE 2O2Bi (RE = rare earth) with Bi square nets. Dalton Transactions, 49(10), 3321-3325. https://doi.org/10.1039/c9dt04640b