Novel infrared vibron absorption in solid hydrogen at megabar pressures
Journal Article
·
· Physical Review Letters; (United States)
- Geophysical Laboratory and Center for High Pressure Research, 5251 Broad Branch Road NW, Carnegie Institution of Washington, Washington, D.C. 20015 (United States)
We report new phenomena associated with the infrared-active vibrons in hydrogen at megabar pressures. We find a striking 3 order of magnitude increase in vibron absorbance at the 150 GPa phase transition at 85 K. A discontinuity in the frequency of the infrared vibron is observed which is identical to that measured by Raman spectroscopy at the same temperature. The results indicate there is a significant change in electronic properties at the transition. In addition, the infrared measurements provide evidence for a phase transition at 110 GPa at low temperature.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6519768
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:24; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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·
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Related Subjects
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
665430* -- Other Topics in Quantum Fluids & Solids-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
BREMSSTRAHLUNG
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
HYDROGEN
INFRARED SPECTRA
LASER SPECTROSCOPY
MOLECULAR CRYSTALS
NONMETALS
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
RADIATIONS
RAMAN SPECTROSCOPY
SPECTRA
SPECTROSCOPY
SYNCHROTRON RADIATION
TEMPERATURE DEPENDENCE
VERY HIGH PRESSURE
665430* -- Other Topics in Quantum Fluids & Solids-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
BREMSSTRAHLUNG
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
HYDROGEN
INFRARED SPECTRA
LASER SPECTROSCOPY
MOLECULAR CRYSTALS
NONMETALS
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
RADIATIONS
RAMAN SPECTROSCOPY
SPECTRA
SPECTROSCOPY
SYNCHROTRON RADIATION
TEMPERATURE DEPENDENCE
VERY HIGH PRESSURE