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• W2979183762 abstract "The structural, electronic, and elastic properties of tetragonal phase of SnTiO 3 and PbTiO 3 are investigated using first principle calculations. The unknown exchange-correlation functional is approximated with generalized gradient approximation (GGA) as implemented in pseudopotential plane wave approach. The convergence test of total energy with respect to energy cutoff and k -point sampling is preformed to ensure the accuracy of the calculations. The structural properties such as equilibrium lattice constant, equilibrium unit cell volume, bulk modulus, and its derivative are in reasonable agreement with the previous experimental and theoretical works. From elastic constants, mechanical parameters such as anisotropy factor A , shear modulus G , bulk modulus B , Young’s modulus E , and Poison’s ratio n are determined by using Voigt–Reuss–Hill average approximation. In addition, Debye temperature and longitudinal and transversal sound velocities are predicted from elastic constants. The electronic band structure and density of states of both compounds are obtained and compared with the available experimental as well as theoretical data. Born effective charge (BEC), phonon dispersion curve, and density of states are computed from functional perturbation theory (DFPT). Lastly, the spontaneous polarization is determined from the modern theory of polarization, and they are in agreement with the previous findings." @default.
• W2979183762 created "2019-10-10" @default.
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• W2979183762 date "2019-09-29" @default.
• W2979183762 modified "2023-10-01" @default.
• W2979183762 title "Structural, Electronic, Lattice Dynamic, and Elastic Properties of SnTiO₃ and PbTiO₃ Using Density Functional Theory" @default.
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• W2979183762 doi "https://doi.org/10.1155/2019/3176148" @default.
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