Vibrational properties of Re2N and Re3N compounds

Deligoz E., Colakoglu K., Ozisik H. B., Ciftci Y.

SOLID STATE COMMUNICATIONS, vol.151, no.17, pp.1122-1127, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 151 Issue: 17
  • Publication Date: 2011
  • Doi Number: 10.1016/j.ssc.2011.05.028
  • Journal Name: SOLID STATE COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1122-1127
  • Gazi University Affiliated: Yes

Abstract

Using first-principles calculations, we have studied the structural, lattice dynamical and thermodynamical properties of the recently synthesized Re2N and Re3N compounds. The generalized gradient approximation is used to model exchange-correlation effects. The phonon dispersion curves are derived using the direct method. The calculated equilibrium lattice parameters are in overall agreement with the available experimental and theoretical results. The present phonon dispersion results show that both compounds are dynamically stable for the structures considered. The temperature-dependent behavior of thermodynamical properties, such as free energy, entropy, heat capacity, and internal energy, is also presented. (C) 2011 Elsevier Ltd. All rights reserved.