Pressure-induced strange metal phase in a metallic kagome ferromagnet
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866929756284387328 |
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| author | Shen, Bin Du, Feng Breitner, Franziska Ginga, Victoria A. Uykur, Ece Tsirlin, Alexander A. Gegenwart, Philipp |
| author_facet | Shen, Bin Du, Feng Breitner, Franziska Ginga, Victoria A. Uykur, Ece Tsirlin, Alexander A. Gegenwart, Philipp |
| contents | Strange metallicity with $T$-linear electrical resistance preceding high-$T_c$ superconductivity remains an enigmatic, yet crucial, signature of correlation physics. Using electrical transport and magnetization measurements up to 50 GPa, we show that such a strange-metal phase is formed in pressurized kagome ferromagnet CrNiAs. In contrast to other kagome materials, a linear suppression of the Curie temperature is found, with the ferromagnetic quantum critical point at $p_{\rm{c}} \approx 12.5$ GPa. Remarkably, from $p_{\rm{c}}$ up to the highest measured pressure, characteristic strange-metal behavior is observed, whereas magnetic field reinstates the Fermi liquid. Electronic structure calculations reveal robust weakly dispersive bands persisting unchanged beyond $p_{\rm{c}}$, possibly at the origin of the $T$-linear electrical resistance. This establishes pressurized kagome ferromagnets as an intriguing platform for strange-metal behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_09524 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pressure-induced strange metal phase in a metallic kagome ferromagnet Shen, Bin Du, Feng Breitner, Franziska Ginga, Victoria A. Uykur, Ece Tsirlin, Alexander A. Gegenwart, Philipp Strongly Correlated Electrons Materials Science Strange metallicity with $T$-linear electrical resistance preceding high-$T_c$ superconductivity remains an enigmatic, yet crucial, signature of correlation physics. Using electrical transport and magnetization measurements up to 50 GPa, we show that such a strange-metal phase is formed in pressurized kagome ferromagnet CrNiAs. In contrast to other kagome materials, a linear suppression of the Curie temperature is found, with the ferromagnetic quantum critical point at $p_{\rm{c}} \approx 12.5$ GPa. Remarkably, from $p_{\rm{c}}$ up to the highest measured pressure, characteristic strange-metal behavior is observed, whereas magnetic field reinstates the Fermi liquid. Electronic structure calculations reveal robust weakly dispersive bands persisting unchanged beyond $p_{\rm{c}}$, possibly at the origin of the $T$-linear electrical resistance. This establishes pressurized kagome ferromagnets as an intriguing platform for strange-metal behavior. |
| title | Pressure-induced strange metal phase in a metallic kagome ferromagnet |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2503.09524 |