High-pressure amorphous nitrogen

E Gregoryanz, AF Goncharov, RJ Hemley, HK Mao

Research output: Contribution to journalArticlepeer-review

Abstract

The phase diagram and stability limits of diatomic solid nitrogen have been explored in a wide pressure-temperature range by several optical spectroscopic techniques, A narrow-g-ap semiconducting phase eta has been found to exist in a range of 80-270 GPa and 10-510 K. The vibrational and optical properties of the eta phase produced under these conditions indicate that it is largely amorphous and back transforms. to a new molecular phase. The band gap of the eta phase is found to decrease with pressure indicating possible metallization by band overlap above 280 GPa.

Original languageEnglish
Article number052103
Number of pages4
JournalPhysical review B: Condensed matter and materials physics
Volume64
Issue number5
Publication statusPublished - 1 Aug 2001

Keywords

  • INDUCED AMORPHIZATION
  • OPTICAL-ABSORPTION
  • SOLID NITROGEN
  • PHASES
  • GPA
  • CURVES
  • RAMAN
  • MBAR
  • N-2

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