Polymorphism of polymeric nitrogen at high pressures

doi:10.1063/5.0007453

	Polymorphism of polymeric nitrogen at high pressures
	Cheng, Peng 4,5; Yang, Xue 3; Zhang, Xiao 4,5; Wang, Yu 4,5; Jiang, Shuqing 2,5; Goncharov, Alexander F.1,4,5
刊名	JOURNAL OF CHEMICAL PHYSICS
	2020-06-28
卷号	152
ISSN号	0021-9606
DOI	10.1063/5.0007453
通讯作者	Goncharov, Alexander F.(agoncharov@carnegiescience.edu)
英文摘要	Polymeric nitrogen at 120 GPa-180 GPa is known in two monatomic crystalline cubic gauche (cg-N) and layered polymeric (LP-N) phases and one amorphous modification (eta -N), and all these high-pressure phases attract considerable attention for their potential application as a high energy density material. Here, we investigated the stability of these modifications at high pressures in the laser heated diamond anvil cell upon decompression from 161 GPa. Pure LP-N was synthesized above 152 GPa upon laser heating of eta -N to 2500 K, while cg-N forms below 150 GPa. Upon laser heating at 129 GPa and 123 GPa, the LP-N clearly diminished, indicating that the synthesis of cg-N becomes more favorable in a mixed phase region below 129 GPa. Upon unloading, cg-N and LP-N were metastable to at least 71 GPa at up to 2500 K and at room temperature, respectively. These observations clarified a complicated polymorphism of monatomic nitrogen at high pressures and large hysteretic phenomena related to a transition to nonmolecular nitrogen.
资助项目	National Natural Science Foundation of China[11504382] ; National Natural Science Foundation of China[21473211] ; National Natural Science Foundation of China[11674330] ; National Natural Science Foundation of China[51672279] ; National Natural Science Foundation of China[11874361] ; National Natural Science Foundation of China[11774354] ; National Natural Science Foundation of China[51727806] ; CASHIPS Director's Fund[YZJJ201705] ; Chinese Academy of Science[YZ201524] ; Chinese Academy of Science[YZJJ2020QN22] ; Science Challenge Project[TZ201601] ; Chinese Academy of Sciences Visiting Professorship for Senior International Scientists[2011T2J20] ; Recruitment Program of Foreign Experts
WOS关键词	PHASE
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000545652300001
资助机构	National Natural Science Foundation of China ; CASHIPS Director's Fund ; Chinese Academy of Science ; Science Challenge Project ; Chinese Academy of Sciences Visiting Professorship for Senior International Scientists ; Recruitment Program of Foreign Experts
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/71010]
专题	中国科学院合肥物质科学研究院
通讯作者	Goncharov, Alexander F.
作者单位	1.Carnegie Inst Sci, Earth & Planets Lab, Washington, DC 20015 USA 2.Jilin Univ, Coll Phys, Synerget Extreme Condit User Facil, Changchun 130012, Jilin, Peoples R China 3.Changchun Inst Technol, Sch Sci, Changchun 130012, Jilin, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 5.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Peng,Yang, Xue,Zhang, Xiao,et al. Polymorphism of polymeric nitrogen at high pressures[J]. JOURNAL OF CHEMICAL PHYSICS,2020,152.
APA	Cheng, Peng,Yang, Xue,Zhang, Xiao,Wang, Yu,Jiang, Shuqing,&Goncharov, Alexander F..(2020).Polymorphism of polymeric nitrogen at high pressures.JOURNAL OF CHEMICAL PHYSICS,152.
MLA	Cheng, Peng,et al."Polymorphism of polymeric nitrogen at high pressures".JOURNAL OF CHEMICAL PHYSICS 152(2020).