Superconductivity in CeBeHand CeBHat moderate pressures.
作者信息
Hou Yu, Li Bin, Bai Yan, Hao Xiaofeng, Yang Yeqian, Chi Fengfeng, Liu Shengli, Cheng Jie, Shi Zhixiang
机构信息
College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, People's Republic of China.
New Energy Technology Engineering Laboratory of Jiangsu Province and School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, People's Republic of China.
出版信息
J Phys Condens Matter. 2022 Oct 28;34(50). doi: 10.1088/1361-648X/ac9bbc.
High-pressure structural searches of superhydrides CeBeHand CeBHwere performed under ambient pressure up to 300 GPa. We identifyFm3‾m-CeBeHwith a superconducting transition temperatureof 56 K at 10 GPa. Two more phases with spacegroupR3‾mandC2/m, were investigated within the increasing pressures. CeBHshows a similar phase transition process as CeBeHbut with higher transition pressures and higher.Fm3‾m-CeBHis predicted to be superconducting above 120 GPa with a maximumof 118 K at 150 GPa.R3‾m-CeBHandC2/m-CeBHare dynamically stable above 120 GPa and 100 GPa, respectively. The maximumis 123 K at 195 GPa forR3‾m-CeBH, and 115 K at 350 GPa forC2/m-CeBH. Our work enriches the family of ternary hydrides and may provide a useful guideline for further search for superconducting hydrides at low and moderate pressures.
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