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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
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2024
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| Acceso en línea: | https://arxiv.org/abs/2412.10998 |
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| author | Mishra, Sanu Kengle, Caitlin S. Thompson, Joe D. Scheie, Allen O. Thomas, Sean. M. Ronning, Filip Rosa, Priscila F. S. |
| author_facet | Mishra, Sanu Kengle, Caitlin S. Thompson, Joe D. Scheie, Allen O. Thomas, Sean. M. Ronning, Filip Rosa, Priscila F. S. |
| contents | The intersection between nonsymmorphic symmetry and electronic correlations has emerged as a platform for topological Kondo semimetallic states and unconventional spin textures. Here we report the synthesis of nonsymmorphic UPd$_{0.65}$Bi$_2$ single crystals and their structural, electronic, magnetic, and thermodynamic properties. UPd$_{0.65}$Bi$_2$ orders antiferromagnetically (AFM) below $T_N\simeq$ 161 K as evidenced by a sharp cusp in magnetic susceptibility, a second-order phase transition in specific heat, and an upturn in electrical resistivity, which suggests an incommensurate AFM structure that deviates from the A-type magnetism typically observed in this class of materials. Across $T_N$, Hall effect measurements reveal a change from electron-dominated to hole-dominated transport, which points to a sharp reconstruction in the electronic structure at $T_N$. Upon further cooling, a first-order transition is observed at $T_1 \simeq 30 $K in magnetic susceptibility and heat capacity but not in electrical resistivity or Hall measurements, which indicates a small change in the AFM structure that does not affect the electronic structure. Our specific heat data reveal a small Sommerfeld coefficient ($γ\simeq$13 mJmol$^{-1}$K$^{-2}$), consistent with localized 5$f$ electrons. Our results indicate that UPd$_{0.65}$Bi$_2$ hosts weak electronic correlations and is likely away from a Kondo semimetallic state. Low-temperature magnetization measurements show that the AFM structure is remarkably stable to 160 kOe and does not undergo any field-induced transitions. Neutron diffraction and magnetization experiments at higher fields would be valuable to probe the presence of unconventional spin textures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_10998 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Evidence for incommensurate antiferromagnetism in nonsymmorphic UPd$_{0.65}$Bi$_2$ Mishra, Sanu Kengle, Caitlin S. Thompson, Joe D. Scheie, Allen O. Thomas, Sean. M. Ronning, Filip Rosa, Priscila F. S. Strongly Correlated Electrons Materials Science Other Condensed Matter The intersection between nonsymmorphic symmetry and electronic correlations has emerged as a platform for topological Kondo semimetallic states and unconventional spin textures. Here we report the synthesis of nonsymmorphic UPd$_{0.65}$Bi$_2$ single crystals and their structural, electronic, magnetic, and thermodynamic properties. UPd$_{0.65}$Bi$_2$ orders antiferromagnetically (AFM) below $T_N\simeq$ 161 K as evidenced by a sharp cusp in magnetic susceptibility, a second-order phase transition in specific heat, and an upturn in electrical resistivity, which suggests an incommensurate AFM structure that deviates from the A-type magnetism typically observed in this class of materials. Across $T_N$, Hall effect measurements reveal a change from electron-dominated to hole-dominated transport, which points to a sharp reconstruction in the electronic structure at $T_N$. Upon further cooling, a first-order transition is observed at $T_1 \simeq 30 $K in magnetic susceptibility and heat capacity but not in electrical resistivity or Hall measurements, which indicates a small change in the AFM structure that does not affect the electronic structure. Our specific heat data reveal a small Sommerfeld coefficient ($γ\simeq$13 mJmol$^{-1}$K$^{-2}$), consistent with localized 5$f$ electrons. Our results indicate that UPd$_{0.65}$Bi$_2$ hosts weak electronic correlations and is likely away from a Kondo semimetallic state. Low-temperature magnetization measurements show that the AFM structure is remarkably stable to 160 kOe and does not undergo any field-induced transitions. Neutron diffraction and magnetization experiments at higher fields would be valuable to probe the presence of unconventional spin textures. |
| title | Evidence for incommensurate antiferromagnetism in nonsymmorphic UPd$_{0.65}$Bi$_2$ |
| topic | Strongly Correlated Electrons Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2412.10998 |