Superconducting dome and structural changes in LaRu$_3$Si$_2$ under pressure
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916696449613824 |
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| author | Li, Zhuoqi Huyan, Shuyuan Thompson, Elizabeth C. Slade, Tyler J. Zhang, Dongzhou Ryu, Young J. Bi, Wenli Bud'ko, Sergey L. Canfield, Paul C. |
| author_facet | Li, Zhuoqi Huyan, Shuyuan Thompson, Elizabeth C. Slade, Tyler J. Zhang, Dongzhou Ryu, Young J. Bi, Wenli Bud'ko, Sergey L. Canfield, Paul C. |
| contents | LaRu$_3$Si$_2$ is of current research interest as a kagome metal with a superconducting transition temperature, $T_c\sim$7 K and higher temperature charge density wave (CDW) orders. Here we report electrical transport and X-ray diffraction measurements on LaRu$_3$Si$_2$ under pressure up to 65 GPa and 35 GPa respectively. The superconducting transition temperature $T_c$ first gets slightly enhanced and reaches a maximum $\sim$8.7 K at $\sim$8.5 GPa. With further applied pressure, $T_c$ is initially gradually suppressed, then more rapidly suppressed, followed by gradual suppression, revealing a superconducting dome. Two possible pressure-induced structural phase transitions are also observed at room temperature, from original hexagonal phase to another hexagonal structure above $\sim$11.5 GPa, and further to a structure with lower symmetry above $\sim$23.5 GPa. These transition pressures roughly correlate with features found in our pressure dependent transport data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2503_11873 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Superconducting dome and structural changes in LaRu$_3$Si$_2$ under pressure Li, Zhuoqi Huyan, Shuyuan Thompson, Elizabeth C. Slade, Tyler J. Zhang, Dongzhou Ryu, Young J. Bi, Wenli Bud'ko, Sergey L. Canfield, Paul C. Superconductivity LaRu$_3$Si$_2$ is of current research interest as a kagome metal with a superconducting transition temperature, $T_c\sim$7 K and higher temperature charge density wave (CDW) orders. Here we report electrical transport and X-ray diffraction measurements on LaRu$_3$Si$_2$ under pressure up to 65 GPa and 35 GPa respectively. The superconducting transition temperature $T_c$ first gets slightly enhanced and reaches a maximum $\sim$8.7 K at $\sim$8.5 GPa. With further applied pressure, $T_c$ is initially gradually suppressed, then more rapidly suppressed, followed by gradual suppression, revealing a superconducting dome. Two possible pressure-induced structural phase transitions are also observed at room temperature, from original hexagonal phase to another hexagonal structure above $\sim$11.5 GPa, and further to a structure with lower symmetry above $\sim$23.5 GPa. These transition pressures roughly correlate with features found in our pressure dependent transport data. |
| title | Superconducting dome and structural changes in LaRu$_3$Si$_2$ under pressure |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2503.11873 |