CALCULATION OF THE RAMAN FREQUENCIES AT LOW PRESSURES AND TEMPERATURES (sigma-PHASE) SOLID NITROGEN

YURTSEVEN H. H., Aslantas A.

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, vol.27, no.23, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 23
  • Publication Date: 2013
  • Doi Number: 10.1142/s0217979213501257
  • Journal Name: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Raman frequency, crystal volume, mode Gruneisen parameter, alpha-phase, solid N-2, X-RAY-DIFFRACTION, ALPHA-N2, SPECTRA, N2, VIBRATIONS, GPA, N-2
  • Middle East Technical University Affiliated: Yes

Abstract

We calculate the Raman frequencies of the E-g mode and, the low and high frequency T-g mode as a function of temperature at a constant pressure of 2.85 kbar in the alpha-phase of solid nitrogen. The Raman frequencies of those lattice modes are calculated using the volume data from the literature at various temperatures (2.85 kbar) for the alpha-phase of solid N-2 through the mode Gruneisen parameter. Our predicted Raman frequencies can be compared with the experimental data and by this method the Raman frequencies can be calculated as a function of temperature at some other constant pressures.