Transformation of hexagonal Lu to cubic LuH$_{2+x}$ single-crystalline films
In: Chinese Phys. Lett. 40,087401(2023); (2023)
Online
report
With the recent report of near ambient superconductivity at room temperature in the N-doped lutetium hydride (Lu-H-N) system, the understanding of cubic Lu-H compounds has attracted worldwide attention. Generally, compared to polycrystal structures with non-negligible impurities, the single-crystalline form of materials with high purity can provide an opportunity to show their hidden properties. However, the experimental synthesis of single-crystalline cubic Lu-H compounds has not been reported thus far. Here, we developed an easy way to synthesize highly pure LuH$_{2+x}$ single-crystalline films by the post-annealing of Lu single-crystalline films (purity of 99.99%) in the H$_2$ atmosphere. The crystal and electronic structures of films were characterized by X-ray diffraction, Raman spectroscopy, and electrical transport. Interestingly, Lu films are silver-white and metallic, whereas their transformed LuH$_{2+x}$ films become purple-red and insulating, indicating the formation of an unreported electronic state of Lu-H compounds possibly. Our work provides a novel route to synthesize and explore more single-crystalline Lu-H compounds.
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Transformation of hexagonal Lu to cubic LuH$_{2+x}$ single-crystalline films
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Autor/in / Beteiligte Person: | Li, Peiyi ; Bi, Jiachang ; Zhang, Shunda ; Cai, Rui ; Su, Guanhua ; Qi, Fugang ; Zhang, Ruyi ; Wei, Zhiyang ; Cao, Yanwei |
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Quelle: | Chinese Phys. Lett. 40,087401(2023); (2023) |
Veröffentlichung: | 2023 |
Medientyp: | report |
DOI: | 10.1088/0256-307X/40/8/087401 |
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