Abstract
The calculations for variations of bulk modulus (B), compression volume (Vp Vo ); lattice constant and phonon frequency spectrum (pfs) under high pressure up to 17 GPa at room temperature has been carried out. Three equations of state (EOSs) including (Birch- Murnaghan, Vinet and modified Lennard-Jouns) are used in the calculations. The variations of these properties under such high pressure for GaAs are obtained and we got suitable EOS for it.
Highlights
The evaluation of pressure-volume (P-V) phonon frequency spectrum and lattice constant are very importance in basic and applied science (Recio et al [12]), equations of state (EOSs) are fundamentally important in study the properties of solid state at high pressure, where the study of (P-V) EOSs of relevant material is one of the most basics are needed for pressure calibration
The Vinet, Birch–Murnaghan (BM) and modified Lennard–Jouns EOSs are intended to accounting volumetric properties for solid which has structural configurations that vary with pressure and temperature (Anderson [1]), BM EOS was derived from the assumption that the strain energy of a solid undergoing compression can be expressed as a Taylor series in the finite strain. (Birch [3])
Radi et al [11] determined the variation of lattice constant with the pressure according to Murnaghan EOS (Murnaghan [10])
Summary
The evaluation of pressure-volume (P-V) phonon frequency spectrum and lattice constant are very importance in basic and applied science (Recio et al [12]), EOSs are fundamentally important in study the properties of solid state at high pressure, where the study of (P-V) EOSs of relevant material is one of the most basics are needed for pressure calibration. The Vinet, Birch–Murnaghan (BM) and modified Lennard–Jouns (mL-J) EOSs are intended to accounting volumetric properties for solid which has structural configurations that vary with pressure and temperature (Anderson [1]), BM EOS was derived from the assumption that the strain energy of a solid undergoing compression can be expressed as a Taylor series in the finite strain. The effect of pressure on bulk modulus (B), compression volume Vp , Vo lattice constant and phonon frequency spectrum (PFS) for GaAs has been achieve using different. Raed Hashim AL-Saqa, Siham Jasem AL-Taie Theoretical Study of Mechanical, Elastic and Phonon
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