摘要
Monoclinicα-MoP_(2),with the OsGe2-type structure(space group C2/m,Z=4)and lattice parameters a=8.7248(11)Å,b=3.2322(4)Å,c=7.4724(9)Å,andβ=119.263°,was synthesized under a pressure of 4~GPa at a temperature between 1100℃and 1200℃.The structure ofα-MoP_(2) and its relationship to other transition metal diphosphides are discussed.Surprisingly,the ambient pressure phase orthorhombicβ-MoP_(2)(space group Cmc21)is denser in structure thanα-MoP_(2).Room-temperature high-pressure x-ray diffraction studies exclude the possibility of phase transition fromβ-MoP_(2) to α-MoP_(2),suggesting thatα-MoP_(2) is a stable phase at ambient conditions;this is also supported by the total energy and phonon calculations.
作者
刘晓磊
于振海
李建福
徐真真
周春银
董朝辉
张丽丽
王霞
余娜
邹志强
王晓丽
郭艳峰
Xiaolei Liu;Zhenhai Yu;Jianfu Li;Zhenzhen Xu;Chunyin Zhou;Zhaohui Dong;Lili Zhang;Xia Wang;Na Yu;Zhiqiang Zou;Xiaoli Wang;Yanfeng Guo(School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;School of Opto-Electronic Information Science and Technology,Yantai University,Yantai 264005,China;Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China;School of Physical Science and Technology and Analytical Instrumentation Center,School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;ShanghaiTech Laboratory for Topological Physics,ShanghaiTech University,Shanghai 201210,China)
基金
Project supported by the National Natural Science Foundation of China (Grant Nos.92065201,11874264,and 11974154)
the Starting Grant of ShanghaiTech University and Analytical Instrumentation Center,SPST,ShanghaiTech University (Grant No.SPST-AIC10112914)
support from the Natural Science Foundation of Shandong Province,China (Grant No.ZR2022MA004)。
