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
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 [Nature615, 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.
Drozdov A P, Kong P P, Minkov V S, Besedin S P, Kuzovnikov M A, Mozaffari S, Balicas L, Balakirev F F, Graf D E, Prakapenka V B, Greenberg E, Knyazev D A, Tkacz M, and Eremets M I 2019 Nature569 528
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Somayazulu M, Ahart M, Mishra A K, Geballe Z M, Baldini M, Meng Y, Struzhkin V V, and Hemley R J 2019 Phys. Rev. Lett.122 027001
Li Z, He X, Zhang C, Lu K, Bin B, Zhang J, Zhang S, Zhao J, Shi L, Peng Y, Feng S, Deng Z, Song J, Liu Q, Wang X, Yu R, Wang L, Li Y, Bass J, Prakapenka V, Chariton S, Liu H, and Jin C 2023 arXiv:2303.05117 [cond-mat.supr-con]
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Dasenbrock-Gammon N, Snider E, McBride R, Pasan H, Durkee D, Khalvashi-Sutter N, Munasinghe S, Dissanayake S E, Lawler K V, Salamat A, and Dias R P 2023 Nature615 244
2023, Vol. 40 
