CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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First principle investigation of the electronic and thermoelectric properties of Mg2C |
Kulwinder Kaur and Ranjan Kumar |
Department of Physics, Panjab University, Chandigarh-160014 (India) |
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Abstract In this paper, electronic and thermoelectric properties of Mg2C are investigated by using first principle pseudo potential method based on density functional theory and Boltzmann transport equations. We calculate the lattice parameters, bulk modulus, band gap and thermoelectric properties (Seebeck coefficient, electrical conductivity, and thermal conductivity) of this material at different temperatures and compare them with available experimental and other theoretical data. The calculations show that Mg2C is indirect band semiconductor with a band gap of 0.75 eV. The negative value of Seebeck coefficient shows that the conduction is due to electrons. The electrical conductivity decreases with temperature and Power factor (PF) increases with temperature. The thermoelectric properties of Mg2C have been calculated in a temperature range of 100 K-1200 K.
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Received: 15 September 2015
Revised: 25 October 2015
Accepted manuscript online:
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PACS:
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64.70.kg
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(Semiconductors)
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72.15.Jf
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(Thermoelectric and thermomagnetic effects)
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74.25.fc
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(Electric and thermal conductivity)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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Corresponding Authors:
Kulwinder Kaur
E-mail: kulwinderphysics@gmail.com
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Cite this article:
Kulwinder Kaur, Ranjan Kumar First principle investigation of the electronic and thermoelectric properties of Mg2C 2016 Chin. Phys. B 25 026402
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