Symmetry Breaking in Dense Solid Hydrogen: Mechanisms for the Transitions to Phase II and Phase III

被引：18
|
作者：
Toledano, Pierre [1 ]
Katzke, Hannelore [2 ]
Goncharov, Alexander F. [3 ]
Hemley, Russell J. [3 ]
机构：
[1] Univ Picardie, F-80000 Amiens, France
[2] Univ Kiel, Inst Geosci, D-24098 Kiel, Germany
[3] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 10期
关键词：
MOLECULAR-HYDROGEN; MEGABAR PRESSURES; DEUTERIUM; GPA; QUANTUM;
D O I：
10.1103/PhysRevLett.103.105301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Spectroscopic data for the high-pressure phases of hydrogen together with the topology of the phase diagram provide new insight on the behavior of the material at megabar pressure. Structural mechanisms are proposed for the transitions to phases II and III. These mechanisms include a partially ordered structure (possibly incommensurate) and an ordered isotranslational structure for the two phases, respectively. The analysis supports the existence of an additional phase, isostructural to phase III, with boundary that meets to form a second triple point with phases I and III.
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页数：4
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