New insight on the phase diagram of the superconducting iron spin ladder BaFe$_2$S$_3$
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917957249007616 |
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| author | Oubaid, Y. Balédent, V. Fabelo, O. Colin, C. V. Chattopadhyay, S. Elkaim, E. Forget, A. Colson, D. Bounoua, D. Verseils, M. Fertey, P. Foury-Leylekian, P. |
| author_facet | Oubaid, Y. Balédent, V. Fabelo, O. Colin, C. V. Chattopadhyay, S. Elkaim, E. Forget, A. Colson, D. Bounoua, D. Verseils, M. Fertey, P. Foury-Leylekian, P. |
| contents | BaFe$_2$S$_3$ and BaFe$_2$Se$_3$ are the only two quasi-one-dimensional iron-based compounds that become superconductors under pressure. Interestingly, these two compounds exhibit different symmetries and properties. While more detailed and recent studies on BaFe$_2$Se$_3$ using single crystals have advanced the filed towards a more universal description of this family, such a study is still lacking for the compound BaFe$_2$S$_3$. Here, we present a detailed study of the crystalline and magnetic structure performed on single crystals using X-ray and neutron diffraction. We demonstrate a polar structure at room temperature within the $Cm2m$ space group, followed by a structural transition at 130 K to the polar $Pb2_1m$ space group. This space group remains unchanged across the magnetic transition at $T_N =95$ K, revealing multiferroic characteristics with a weak magnetoelastic coupling. The determined magnetic structure is monoclinic ($P_am$), with non-collinear magnetic moments, displaying a significant angle of 18$^\circ$ relative to the $a$-axis in the $(a, c)$ plane. This reexamination of the temperature-dependent properties of BaFe$_2$S$_3$ provides new insights into the physics of this system from multiple key perspectives. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_10942 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | New insight on the phase diagram of the superconducting iron spin ladder BaFe$_2$S$_3$ Oubaid, Y. Balédent, V. Fabelo, O. Colin, C. V. Chattopadhyay, S. Elkaim, E. Forget, A. Colson, D. Bounoua, D. Verseils, M. Fertey, P. Foury-Leylekian, P. Strongly Correlated Electrons Superconductivity BaFe$_2$S$_3$ and BaFe$_2$Se$_3$ are the only two quasi-one-dimensional iron-based compounds that become superconductors under pressure. Interestingly, these two compounds exhibit different symmetries and properties. While more detailed and recent studies on BaFe$_2$Se$_3$ using single crystals have advanced the filed towards a more universal description of this family, such a study is still lacking for the compound BaFe$_2$S$_3$. Here, we present a detailed study of the crystalline and magnetic structure performed on single crystals using X-ray and neutron diffraction. We demonstrate a polar structure at room temperature within the $Cm2m$ space group, followed by a structural transition at 130 K to the polar $Pb2_1m$ space group. This space group remains unchanged across the magnetic transition at $T_N =95$ K, revealing multiferroic characteristics with a weak magnetoelastic coupling. The determined magnetic structure is monoclinic ($P_am$), with non-collinear magnetic moments, displaying a significant angle of 18$^\circ$ relative to the $a$-axis in the $(a, c)$ plane. This reexamination of the temperature-dependent properties of BaFe$_2$S$_3$ provides new insights into the physics of this system from multiple key perspectives. |
| title | New insight on the phase diagram of the superconducting iron spin ladder BaFe$_2$S$_3$ |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2503.10942 |