Correlated High-Pressure Phase Sequence of VO2 under Strong Compression

doi:10.1021/acs.jpclett.8b00771

	Correlated High-Pressure Phase Sequence of VO2 under Strong Compression
	Liu, HZ; Xie, SY; Wang, LH; Liu, FY; Li, XB; Bai, LG; Prakapenka, VB; Cai, ZH; Mao, HK; Zhang, SB
刊名	JOURNAL OF PHYSICAL CHEMISTRY LETTERS
	2018
卷号	9 期号:9 页码:2388-2393
ISSN号	1948-7185
DOI	10.1021/acs.jpclett.8b00771
文献子类	Article
英文摘要	Understanding how the structures of a crystal behave under compression is a fundamental issue both for condensed matter physics and for geoscience. Traditional description of a crystal as the stacking of a unit cell with special symmetry has gained much success on the analysis of physical properties. Unfortunately, it is hard to reveal the relationship between the compressed phases. Taking the family of metal dioxides (MO2) as an example, the structural evolution, subject to fixed chemical formula and highly confined space, often appears as a set of random and uncorrelated events. Here we provide an alternative way to treat the crystal as the stacking of the coordination polyhedron and then discover a unified structure transition pattern, in our case VO2. X-ray diffraction (XRD) experiments and first-principles calculations show that the coordination increase happens only at one apex of the V-centered octahedron in an orderly fashion, leaving the base plane and the other apex topologically intact. The polyhedron evolves toward increasing their sharing, indicating a general rule for the chemical bonds of MO2 to give away the ionicity in exchange for covalency under pressure.
WOS关键词	MULTIMEGABAR PRESSURES ; MOTT-HUBBARD ; PREDICTION ; NUMBER
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000431724400043
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285922]
专题	高能物理研究所_多学科研究中心高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Liu, HZ,Xie, SY,Wang, LH,et al. Correlated High-Pressure Phase Sequence of VO2 under Strong Compression[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2018,9(9):2388-2393.
APA	Liu, HZ.,Xie, SY.,Wang, LH.,Liu, FY.,Li, XB.,...&白利刚.(2018).Correlated High-Pressure Phase Sequence of VO2 under Strong Compression.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,9(9),2388-2393.
MLA	Liu, HZ,et al."Correlated High-Pressure Phase Sequence of VO2 under Strong Compression".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 9.9(2018):2388-2393.