Pressure-induced Superconductivity in the Iron-based Ladder Material BaFe2S3
| Autor: | Takahashi, Hiroki, Sugimoto, Akira, Nambu, Yusuke, Yamauchi, Touru, Hirata, Yasuyuki, Kawakami, Takateru, Avdeev, Maxim, Matsubayashi, Kazuyuki, Du, Fei, Kawashima, Chizuru, Soeda, Hideto, Nakano, Satoshi, Uwatoko, Yoshiya, Ueda, Yutaka, Sato, Taku J., Ohgushi, Kenya |
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| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/nmat4351 |
| Popis: | All the iron-based superconductors identified to date share a square lattice composed of Fe atoms as a common feature, despite having different crystal structures. In copper-based materials, the superconducting phase emerges not only in square lattice structures but also in ladder structures. Yet iron-based superconductors without a square lattice motif have not been found despite being actively sought out. Here, we report the discovery of pressure-induced superconductivity in the iron-based spin-ladder material BaFe2S3, a Mott insulator with striped-type magnetic ordering below ~120 K. On the application of pressure this compound exhibits a metal-insulator transition at about 11 GPa, followed by the appearance of superconductivity below Tc = 14 K, right after the onset of the metallic phase. Our findings indicate that iron-based ladder compounds represent promising material platforms, in particular for studying the fundamentals of iron-based superconductivity. Comment: in Nature Materials, 20 July 2015 |
| Databáze: | arXiv |
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