title: Pressure-induced superconductivity in the iron-based ladder material BaFe2S3.
abstract: 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.
authors.affiliation: College of Humanities &Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Takahashi
authors.affiliation: College of Humanities &Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Sugimoto
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan.|Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Nambu
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Touru
authors.initials: T
authors.lastname: Yamauchi
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Hirata
authors.affiliation: College of Humanities &Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
authors.forename: Takateru
authors.initials: T
authors.lastname: Kawakami
authors.affiliation: Bragg Institute, Australian Nuclear Science and Technology Organisation, Locked Bag 2001 Kirrawee DC, New South Wales 2232, Australia.|School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia.
authors.forename: Maxim
authors.initials: M
authors.lastname: Avdeev
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Matsubayashi
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.|Key laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Du
authors.affiliation: College of Humanities &Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
authors.forename: Chizuru
authors.initials: C
authors.lastname: Kawashima
authors.affiliation: College of Humanities &Sciences, Nihon University, Sakurajosui, Setagaya-ku, Tokyo 156-8550, Japan.
authors.forename: Hideto
authors.initials: H
authors.lastname: Soeda
authors.affiliation: Ultra-High Pressure Processes Group, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nakano
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: Yoshiya
authors.initials: Y
authors.lastname: Uwatoko
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.|Toyota Physical and Chemical Research Institute, Nagakute, Aichi 480-1192, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ueda
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Miyagi 980-8577, Japan.
authors.forename: Taku J
authors.initials: TJ
authors.lastname: Sato
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan.|Department of Physics, Tohoku University, Sendai, Miyagi 980-8578, Japan.
authors.forename: Kenya
authors.initials: K
authors.lastname: Ohgushi