Pressure-Induced Color Change in the Lutetium Dihydride LuH2  

作　　者：单鹏飞 王宁宁 郑希诠 仇清正 彭莹莹 程金光 Pengfei Shan;Ningning Wang;Xiquan Zheng;Qingzheng Qiu;Yingying Peng;Jinguang Cheng(Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China

出　　处：《Chinese Physics Letters》2023年第4期40-43,共4页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12025408,11921004,11888101,and 11974029);the Beijing Natural Science Foundation (Grant No.Z190008);the National Key R&D Program of China (Grant Nos.2018YFA0305700 and 2021YFA1400200);the Strategic Priority Research Program of CAS (Grant No.XDB33000000);the CAS Interdisciplinary Innovation Team (Grant No.JCTD-2019-01)。

摘　　要：The lutetium dihydride LuH2is stable at ambient conditions.Here we show that its color undergoes sequential changes from dark blue at ambient pressure to pink at ~2.2 GPa and then to bright red at ~4 GPa upon compression in a diamond anvil cell.Such a pressure-induced color change in LuH2is 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 LuH2under pressures up to ~7 GPa evidenced no superconductivity down to 1.5 K.

关 键 词：HYDRIDE RESISTANCE AMBIENT 

分 类 号：O469[理学—凝聚态物理] O614.347[理学—电子物理学]