Vibrational dynamics of solid molecular nitrogen to megabar pressures

AF Goncharov, E Gregoryanz, HK Mao, RJ Hemley

Research output: Contribution to journalArticlepeer-review

Abstract

We report the results of Raman and synchrotron infrared absorption measurements of several molecular phases of solid nitrogen to pressures above 100 GPa (300 K). Low-temperature vibrational spectra to 45 GPa are also presented. The changes in Raman and infrared spectra at 60 GPa and 300 K are interpreted as arising from the epsilon-->zeta transition reported at low temperature. The character of splitting of the Raman vibron nu (2) observed at 25 GPa and low temperatures differs from that previously reported, a difference that we ascribe to different experimental procedures employed and metastability of the low-temperature phase. (C) 2001 American Institute of Physics.

Original languageEnglish
Pages (from-to)866-869
Number of pages4
JournalLow temperature physics
Volume27
Issue number9-10
Publication statusPublished - 2001

Keywords

  • X-RAY-DIFFRACTION
  • RAMAN-SPECTROSCOPY
  • ORIENTATIONAL BEHAVIOR
  • 2ND-ORDER TRANSITION
  • PHASE-TRANSITIONS
  • DELTA-PHASE
  • GPA
  • N-2
  • TRANSFORMATIONS
  • TEMPERATURES

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