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Evaluation of Spinodal Pressure for Gallium nitride in the Zinc-blend and Wurtzite Structures by Using Different Equations of State (EOSs) | ||
| Rafidain Journal of Science | ||
| Article 21, Volume 27, Issue 1, 2018, Pages 184-189 PDF (508.22 K) | ||
| DOI: 10.33899/rjs.2018.143957 | ||
| Authors | ||
| Salar A. Mawlood; Adnan. M. AL-Sheikh; Mumtaz M. Hussien | ||
| Abstract | ||
| According to the definition of spinodal pressure as the negative pressure at which bulk modulus (of a substance) go to zero. Extrapolation of variation of bulk modulus results with pressure has been used to evaluate spinodal pressure for GaN in zinc-blende and wurtzite structures using different equations of state (EOS) (Birch-Murnaghan, Bardeen, Libby and Libby, and Born-Mie). Result obtained in the present work for GaN in the zinc-blende structure using Born-Mie equation of state shows a good agreement with literature. While results for wurtzite structure, obtained by using Birch-Murnaghan and Bardeen EOSs are in a good agreement with literature. Present results and many literature show that (Jiuxun, 2005) approach for evaluation of spinodal pressure yield results in less agreement with other works | ||
| Keywords | ||
| EOS; GaN; spinodal pressure; Negative pressure; Bulk modulus | ||
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