Phonon localization by mass disorder in dense hydrogen-deuterium binary alloy
Using a combination of the Raman spectroscopy and density functional theory calculations on dense hydrogen-deuterium mixtures of various concentrations, we demonstrate that, at 300 K and above 200 GPa, they transform into phase IV, forming a disordered binary alloy with six highly localized intramol...
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| Published in | Physical review letters Vol. 113; no. 17; p. 175501 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
24.10.2014
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| Abstract | Using a combination of the Raman spectroscopy and density functional theory calculations on dense hydrogen-deuterium mixtures of various concentrations, we demonstrate that, at 300 K and above 200 GPa, they transform into phase IV, forming a disordered binary alloy with six highly localized intramolecular vibrational (vibrons) and four delocalized low-frequency (<1200 cm(-1)) modes. Hydrogen-deuterium mixtures are unique in showing a purely mass-induced localization effect in the quantum solid: chemical bonding is isotope-independent while the mass varies by a factor of 2. |
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| AbstractList | Using a combination of the Raman spectroscopy and density functional theory calculations on dense hydrogen-deuterium mixtures of various concentrations, we demonstrate that, at 300 K and above 200 GPa, they transform into phase IV, forming a disordered binary alloy with six highly localized intramolecular vibrational (vibrons) and four delocalized low-frequency (<1200 cm(-1)) modes. Hydrogen-deuterium mixtures are unique in showing a purely mass-induced localization effect in the quantum solid: chemical bonding is isotope-independent while the mass varies by a factor of 2. |
| Author | Howie, Ross T Magdău, Ioan B Ackland, Graeme J Gregoryanz, Eugene Goncharov, Alexander F |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/25379921$$D View this record in MEDLINE/PubMed |
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| Title | Phonon localization by mass disorder in dense hydrogen-deuterium binary alloy |
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