Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.175501
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Funding
- U.K. Engineering and Physical Sciences Research Council
- NSF
- Engineering and Physical Sciences Research Council [1262797, EP/J003999/1, EP/F03721X/1] Funding Source: researchfish
- Division Of Earth Sciences
- Directorate For Geosciences [1015239] Funding Source: National Science Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [1128867] Funding Source: National Science Foundation
- EPSRC [EP/J003999/1, EP/F03721X/1] Funding Source: UKRI
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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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