Structural, high pressure and elastic properties of transition metal monocarbides: A FP-LAPW study |
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| Authors: | Pooja Soni Gitanjali Pagare Sankar P. Sanyal |
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| Affiliation: | a Department of Physics, Government M.L.B. Girls P.G. College, Bhopal 462002, India
b Condensed Matter Physics Laboratory, Department of Physics, Barkatullah University, Bhopal 462026, India |
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| Abstract: | The structural, elastic and thermal properties of four transition metal monocarbides ScC, YC (group III), VC and NbC (group V) have been investigated using full potential linearized augmented plane wave (FP-LAPW) method within generalized gradient approximation (GGA) both at ambient and high pressure. We predict a B1 to B2 structural phase transition at 127.8 and 80.4 GPa for ScC and YC along with the volume collapse percentage of 7.6 and 8.4%, respectively. No phase transition is observed in case of VC and NbC up to pressure 400 and 360 GPa, respectively. The ground state properties such as equilibrium lattice constant (a0), bulk modulus (B) and its pressure derivative (B′) are determined and compared with available data. We have computed the elastic moduli and Debye temperature and report their variation as a function of pressure. |
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| Keywords: | C. Ab initio calculations C. High pressure D. Elastic properties D. Phase transition D. Thermodynamic properties |
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