Megabar pressure triple point in solid deuterium
- 9 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 72 (19) , 3048-3051
- https://doi.org/10.1103/physrevlett.72.3048
Abstract
Solid orthodeuterium and mixed ortho-para crystals have been studied by infrared and Raman spectroscopy to a pressure of 186 GPa. We observe two clear phase transition lines and a triple point where they meet; no critical point is observed as reported for hydrogen. We believe that previous reports of a critical point in hydrogen are erroneous. Symmetry arguments are used to identify and narrow down the possible structures for the various phases.Keywords
This publication has 22 references indexed in Scilit:
- Band Gap Closure and Metallization of Molecular Solid HydrogenEurophysics Letters, 1990
- Order parameter and a critical point on the megabar-pressure hydrogen-A phase linePhysical Review Letters, 1990
- Critical Behavior in the Hydrogen Insulator-Metal TransitionScience, 1990
- Orientational phase transitions in hydrogen at megabar pressuresPhysical Review Letters, 1990
- Evidence for a structural phase transition in solid hydrogen at megabar pressuresPhysical Review Letters, 1989
- Isotope effects in dense solid hydrogen: Phase transition in deuterium at 190±20 GPaPhysical Review Letters, 1989
- Theory of high-pressure phases of hydrogenPhysical Review Letters, 1989
- New Low-Temperature Phase of Molecular Deuterium at Ultrahigh PressurePhysical Review Letters, 1981
- Combined representation method for use in band-structure calculations: Application to highly compressed hydrogenPhysical Review B, 1977
- Exact-Exchange Crystal Hartree-Fock Calculations of Molecular and Metallic Hydrogen and Their TransitionsPhysical Review Letters, 1975