The Electronic and Elastic Properties of Samarium Monochalcogenides SmX (X = S, Se and Te) at Different Pressure
Keywords:
Samarium monochalcogenides, Electronic properties, Bulk modulus, Bond length, Plasmon energyAbstract
Abstract: In this work, the electronic and elastic properties of samarium monochalcogenides (SmX, where X = S, Se, and Te) are investigated using the plasma oscillation theory of solids. We present a simple relation for the plasmon energy of solids, obtained from the bond length at a given pressure in relation to the homopolar energy gap, heteropolar energy gap, average energy gap, crystal ionicity, electronic polarizability and bulk modulus of Samarium monochalcogenides. The calculated values of the homopolar energy gap, heteropolar energy gap, average energy gap, crystal ionicity, electronic polarizability, and bulk modulus at ambient pressure are found to be 2.458 eV, 5.478 eV, 6.005 eV, 0.8060, 8.93 and 58.506 GPa respectively for SmS, 2.218 eV, 5.117 eV, 5.577 eV, 0.8150, 9.731 and 52.855 GPa respectively for SmSe, 1.864 eV, 4.576 eV, 4.941 eV, 0.8300, 12.155 and 44.765 GPa respectively for SmTe. The calculated results show good agreement with the available experimental and theoretical data.
Keywords: Samarium monochalcogenides, Electronic properties, Bulk modulus, Bond length, Plasmon energy.
References
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