| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Superconductivity above 30 K Achieved in Dense Scandium |
| Xin He1,2,3†, Changling Zhang1,2†, Zhiwen Li1,2, Sijia Zhang1, Shaomin Feng1, Jianfa Zhao1,2, Ke Lu1,2, Baosen Min1,2, Yi Peng1,2, Xiancheng Wang1,2*, Jin Song1, Luhong Wang4, Saori I. Kawaguchi5, Cheng Ji6, Bing Li6, Haozhe Liu6, J. S. Tse7, and Changqing Jin1,2,3* |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
3Songshan Lake Materials Laboratory, Dongguan 523808, China
4Shanghai Advanced Research in Physical Sciences, Shanghai 201203, China
5Japan Synchrotron Radiation Research Institute, SPring-8, Sayo-gun Hyogo 679-5198, Japan
6Center for High Pressure Science & Technology Advanced Research, Beijing 100094, China
7Department of Physics, University of Saskatchewan, Canada
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| Cite this article: |
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Xin He, Changling Zhang, Zhiwen Li et al 2023 Chin. Phys. Lett. 40 107403 |
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Abstract Superconductivity is one of most intriguing quantum phenomena, and the quest for elemental superconductors with high critical temperature ($T_{\rm c}$) is of great scientific significance due to their relatively simple material composition and the underlying mechanism. Here we report the experimental discovery of densely compressed scandium (Sc) becoming the first elemental superconductor with $T_{\rm c}$ breaking into 30 K range, which is comparable to the $T_{\rm c}$ values of the classic La–Ba–Cu–O or LaFeAsO superconductors. Our results show that $T_{\rm c}^{\rm onset}$ of Sc increases from $\sim$ $3$ K at around 43 GPa to $\sim$ $32$ K at about 283 GPa ($T_{\rm c}^{\rm zero} \sim 31$ K), which is well above liquid neon temperature. Interestingly, measured $T_{\rm c}$ shows no sign of saturation up to the maximum pressure achieved in our experiments, indicating that $T_{\rm c}$ may be even higher upon further compression.
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Received: 26 August 2023
Express Letter
Published: 20 September 2023
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