| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Pressure-Induced Color Change in the Lutetium Dihydride LuH$_{2}$ |
| Pengfei Shan1,2†, Ningning Wang1,2†*, Xiquan Zheng3, Qingzheng Qiu3, Yingying Peng3, and Jinguang Cheng1,2* |
1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
3International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
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| Cite this article: |
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Pengfei Shan, Ningning Wang, Xiquan Zheng et al 2023 Chin. Phys. Lett. 40 046101 |
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Abstract The lutetium dihydride LuH$_{2}$ is stable at ambient conditions. Here we show that its color undergoes sequential changes from dark blue at ambient pressure to pink at $\sim$ $2.2$ GPa and then to bright red at $\sim$ $4$ GPa upon compression in a diamond anvil cell. Such a pressure-induced color change in LuH$_{2}$ is reversible and it is very similar to that recently reported in the N-doped lutetium hydride [Nature 615, 244 (2023)]. However, our preliminary resistance measurements on LuH$_{2}$ under pressures up to $\sim$ $7$ GPa evidenced no superconductivity down to 1.5 K.
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Received: 13 March 2023
Express Letter
Published: 19 March 2023
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| PACS: |
61.10.Nz
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07.35.+k
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(High-pressure apparatus; shock tubes; diamond anvil cells)
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78.40.Kc
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(Metals, semimetals, and alloys)
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74.70.Ad
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(Metals; alloys and binary compounds)
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