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Band structure, Fermi surface, elastic, thermodynamic, and optical properties of AlZr3, AlCu3, and AlCu2Zr: First-principles study |
| Parvin R1, Parvin F1, Ali M S2, Islam A K M A3 |
1 Department of Physics, Rajshahi University, Rajshahi-6205, Bangladesh;
2 Department of Physics, Pabna University of Science and Technology, Pabna 6600, Bangladesh;
3 International Islamic University Chittagong, 154/A College Road, Chittagong-4203, Bangladesh |
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Abstract The electronic properties (Fermi surface, band structure, and density of states (DOS)) of Al-based alloys AlM3 (M=Zr and Cu) and AlCu2Zr are investigated using the first-principles pseudopotential plane wave method within the generalized gradient approximation (GGA). The structural parameters and elastic constants are evaluated and compared with other available data. Also, the pressure dependences of mechanical properties of the compounds are studied. The temperature dependence of adiabatic bulk modulus, Debye temperature, specific heat, thermal expansion coefficient, entropy, and internal energy are all obtained for the first time through quasi-harmonic Debye model with phononic effects for T=0 K-100 K. The parameters of optical properties (dielectric functions, refractive index, extinction coefficient, absorption spectrum, conductivity, energy-loss spectrum, and reflectivity) of the compounds are calculated and discussed for the first time. The reflectivities of the materials are quite high in the IR-visible-UV region up to ~15 eV, showing that they promise to be good coating materials to avoid solar heating. Some of the properties are also compared with those of the Al-based Ni3Al compound.
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Received: 10 October 2015
Revised: 04 April 2016
Accepted manuscript online:
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PACS:
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31.15.A-
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(Ab initio calculations)
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71.18.+y
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(Fermi surface: calculations and measurements; effective mass, g factor)
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62.20.de
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(Elastic moduli)
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65.40.gd
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(Entropy)
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Corresponding Authors:
Ali M S
E-mail: shahajan199@yahoo.com
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Cite this article:
Parvin R, Parvin F, Ali M S, Islam A K M A Band structure, Fermi surface, elastic, thermodynamic, and optical properties of AlZr3, AlCu3, and AlCu2Zr: First-principles study 2016 Chin. Phys. B 25 083101
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