biostudies-literatureUnknown11(37)Ke FOxide perovskite superconductors typically feature stacks of metal-oxygen octahedra or planar blocks connected through corners, forming three-dimensional (3D) or 2D layered structures. Here, we find a group of quasi-1D superconducting materials among hexagonal perovskite chalcogenides with face-sharing connectivity. Resistance and magnetization measurements demonstrate anisotropic superconductivity in compressed barium titanium trisulfide (BaTiS₃) at a low hole carrier concentration of (1.6 ± 0.1) × 10²¹ per cubic centimeter, with the highest superconducting temperature (<i>T</i>_c) reaching ~9.3 kelvin. Synchrotron x-ray diffraction indicates that the superconducting phase retains a hexagonal perovskite structure consisting of quasi-1D infinite titanium hexScience advanceseadv1894https://www.ebi.ac.uk/biostudies/studies/S-EPMC12429050biostudies-literatureSuperconductivity in compressed quasi-one-dimensional face-sharing hexagonal perovskite chalcogenides.PMC12429050Yang HKe FHan MJia CLin YChen BCeleste AWang LNiu SFeng JWang BYMao WLTian YHwang HYYin KfalseSuperconductivity in compressed quasi-one-dimensional face-sharing hexagonal perovskite chalcogenides.Oxide perovskite superconductors typically feature stacks of metal-oxygen octahedra or planar blocks connected through corners, forming three-dimensional (3D) or 2D layered structures. Here, we find a group of quasi-1D superconducting materials among hexagonal perovskite chalcogenides with face-sharing connectivity. Resistance and magnetization measurements demonstrate anisotropic superconductivity in compressed barium titanium trisulfide (BaTiS₃) at a low hole carrier concentration of (1.6 ± 0.1) × 10²¹ per cubic centimeter, with the highest superconducting temperature (<i>T</i>_c) reaching ~9.3 kelvin. Synchrotron x-ray diffraction indicates that the superconducting phase retains a hexagonal perovskite structure consisting of quasi-1D infinite titanium hex2025-01-01T00:00:00Z2025 Sep2026-06-01T15:57:19.043Z2026-04-08T13:55:59.658ZS-EPMC124290504093899010.1126/sciadv.adv1894