Browsing by Author "Sugimoto, A"

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    Pressure-induced superconductivity in the iron-based ladder material BaFe2S3
    (Springer Nature, 2015-07-20) Takahashi, H; Sugimoto, A; Nambu, Y; Yamauchi, T; Hirata, Y; Kawakami, T; Avdeev, M; Matsubayashi, K; Du, F; Kawashima, C; Soeda, H; Nakano, S; Uwatoko, Y; Ueda, Y; Sato, TJ; Ohgushi, K
    All the iron-based superconductors identified so far 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. © 2015, Nature Publishing Group