期刊
PHYSICAL REVIEW B
卷 86, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.214104
关键词
-
资金
- U.K. Engineering and Physical Sciences Research Council
- Institute of Shock Physics, Imperial College
- EPSRC [EP/J003999/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J003999/1] Funding Source: researchfish
Using in situ optical spectroscopy we have investigated the temperature stability of the mixed atomic and molecular phases IV of dense deuterium and hydrogen. Through a series of low-temperature experiments at high pressures, we observe phase III-to-IV transformation, imposing constraints on the P-T phase diagrams. The spectral features of the phase IV-III transition and differences in appearances of the isotopes Raman spectra strongly indicate the presence of proton tunneling in phase IV. No differences between isotopes were observed in absorption spectroscopic studies, resulting in identical values for the band gap. The extrapolation of the combined band gap yields 375 GPa as the minimum transition pressure to the metallic state of hydrogen (deuterium). The minute changes in optical spectra above 275 GPa might suggest the presence of a new solid modification of hydrogen (deuterium), closely related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据