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Phonon Localization by Mass Disorder in Dense Hydrogen-Deuterium Binary Alloy

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http://www.ph.ed.ac.uk/news/localization-search-metallic-hydrogen-24-10-14
Original languageEnglish
Article number175501
Number of pages5
JournalPhysical Review Letters
Volume113
Issue number17
DOIs
StatePublished - 21 Oct 2014

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.

    Research areas

  • ANDERSON LOCALIZATION, RAMAN-SPECTRA, DIFFUSION, ABSENCE

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