Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen

doi:10.1038/s41586-019-1927-3

GSTDTAP > 地球科学

DOI	10.1038/s41586-019-1927-3
	Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen
	Zhuang, Zhe; Yu, Jin-Quan
	2020-01-30
发表期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2020
卷号	577 期号:7792 页码:631-+
文章类型	Article
语种	英语
国家	France
英文关键词	Hydrogen has been an essential element in the development of atomic, molecular and condensed matter physics(1). It is predicted that hydrogen should have a metal state(2) however, understanding the properties of dense hydrogen has been more complex than originally thought, because under extreme conditions the electrons and protons are strongly coupled to each other and ultimately must both be treated as quantum particles(3,4). Therefore, how and when molecular solid hydrogen may transform into a metal is an open question. Although the quest for metal hydrogen has pushed major developments in modern experimental high-pressure physics, the various claims of its observation remain unconfirmed(5-7). Here a discontinuous change of the direct bandgap of hydrogen, from 0.6 electronvolts to below 0.1 electronvolts, is observed near 425 gigapascals. This result is most probably associated with the formation of the metallic state because the nucleus zero-point energy is larger than this lowest bandgap value. Pressures above 400 gigapascals are achieved with the recently developed toroidal diamond anvil cell(8), and the structural changes and electronic properties of dense solid hydrogen at 80 kelvin are probed using synchrotron infrared absorption spectroscopy. The continuous downward shifts of the vibron wavenumber and the direct bandgap with increased pressure point to the stability of phase-III hydrogen up to 425 gigapascals. The present data suggest that metallization of hydrogen proceeds within the molecular solid, in good agreement with previous calculations that capture many-body electronic correlations(9).
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000510520700053
WOS关键词	SOLID HYDROGEN ; DENSE HYDROGEN ; PHASE ; NEUTRON
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/281401
专题	地球科学资源环境科学气候变化
作者单位	Scripps Res Inst, Dept Chem, La Jolla, CA 92037 USA
推荐引用方式 GB/T 7714	Zhuang, Zhe,Yu, Jin-Quan. Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen[J]. NATURE,2020,577(7792):631-+.
APA	Zhuang, Zhe,&Yu, Jin-Quan.(2020).Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen.NATURE,577(7792),631-+.
MLA	Zhuang, Zhe,et al."Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen".NATURE 577.7792(2020):631-+.