Pressure Induced 18 K Superconductivity and Two Superconducting Phases in CuIr2S4
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| author | Chen, Bijuan Gu, Yuhao Wang, Dong Shao, Dexi Deng, Wen Han, Xin Jin, Meiling Song, Jing Zeng, Yu Ishii, Hirofumi Liao, Yen-Fa Zhang, Dongzhou Zhang, Jianbo Long, Youwen Zhu, Jinlong Yang, Liuxiang Xiao, Hong Nei, Jia-cai Shi, Youguo Jin, Changqing Hu, Jiangping Mao, Ho-kwang Ding, Yang |
| author_facet | Chen, Bijuan Gu, Yuhao Wang, Dong Shao, Dexi Deng, Wen Han, Xin Jin, Meiling Song, Jing Zeng, Yu Ishii, Hirofumi Liao, Yen-Fa Zhang, Dongzhou Zhang, Jianbo Long, Youwen Zhu, Jinlong Yang, Liuxiang Xiao, Hong Nei, Jia-cai Shi, Youguo Jin, Changqing Hu, Jiangping Mao, Ho-kwang Ding, Yang |
| contents | We report pressure-induced superconductivity in the spinel CuIr$_{2}$S$_{4}$ with a transition temperature ($T_{\text{c}}$) reaching \textbf{18.2 K}, establishing a new record for this class of materials and surpassing the decades-old limit of 13.7 K. Our electrical transport and synchrotron X-ray diffraction studies up to 224 GPa reveal the emergence of \textbf{two distinct superconducting phases} from a charge-ordered insulating state. The first phase (SC-I) appears around 18 GPa, and forms a dome-shaped superconducting region in which the resistivity exhibits a pronounced, field- and current-sensitive drop without reaching strict zero above our base temperature. Above 111.8 GPa, a second, lower-$T_{\text{c}}$ phase (SC-II) emerges and coexists with SC-I over a broad pressure range, and SC-II ultimately develops a true zero-resistance state above 122.2 GPa. These superconducting phases are intimately linked to a cascade of structural transitions that systematically distort the frustrated pyrochlore lattice of Ir atoms. Our results expand the potential for superconductivity in spinels and demonstrate a pathway to high-$T_{\text{c}}$ pairing directly from a correlated insulating state driven by lattice tuning. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_04407 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pressure Induced 18 K Superconductivity and Two Superconducting Phases in CuIr2S4 Chen, Bijuan Gu, Yuhao Wang, Dong Shao, Dexi Deng, Wen Han, Xin Jin, Meiling Song, Jing Zeng, Yu Ishii, Hirofumi Liao, Yen-Fa Zhang, Dongzhou Zhang, Jianbo Long, Youwen Zhu, Jinlong Yang, Liuxiang Xiao, Hong Nei, Jia-cai Shi, Youguo Jin, Changqing Hu, Jiangping Mao, Ho-kwang Ding, Yang Superconductivity We report pressure-induced superconductivity in the spinel CuIr$_{2}$S$_{4}$ with a transition temperature ($T_{\text{c}}$) reaching \textbf{18.2 K}, establishing a new record for this class of materials and surpassing the decades-old limit of 13.7 K. Our electrical transport and synchrotron X-ray diffraction studies up to 224 GPa reveal the emergence of \textbf{two distinct superconducting phases} from a charge-ordered insulating state. The first phase (SC-I) appears around 18 GPa, and forms a dome-shaped superconducting region in which the resistivity exhibits a pronounced, field- and current-sensitive drop without reaching strict zero above our base temperature. Above 111.8 GPa, a second, lower-$T_{\text{c}}$ phase (SC-II) emerges and coexists with SC-I over a broad pressure range, and SC-II ultimately develops a true zero-resistance state above 122.2 GPa. These superconducting phases are intimately linked to a cascade of structural transitions that systematically distort the frustrated pyrochlore lattice of Ir atoms. Our results expand the potential for superconductivity in spinels and demonstrate a pathway to high-$T_{\text{c}}$ pairing directly from a correlated insulating state driven by lattice tuning. |
| title | Pressure Induced 18 K Superconductivity and Two Superconducting Phases in CuIr2S4 |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2411.04407 |