• Thermal and pressure dependence of mechanical properties for Al$_x$In$_{1-x}$P$_y$Sb$_{1-y}$/GaSb system

• # Fulltext

https://www.ias.ac.in/article/fulltext/boms/044/0209

• # Keywords

Mechanical properties; Al$_x$In$_{1-x}$P$_y$Sb$_{1-y}$ alloys; GaSb substrate; pressure; temperature.

• # Abstract

Mechanical properties of Al$_x$In$_{1-x}$P$_y$Sb$_{1-y}$ quaternary alloy in zinc-blend structure lattice-matched to GaSb substrate are studied under the effects of temperature and pressure. The calculations are done based on empirical pseudopotential method modified with virtual crystal approximation joins compositional disorder impact. Such a model provides analytical data for the compositional dependence of the energy band gaps of Al$_x$In$_{1-x}$P$_y$Sb$_{1-y}$/GaSb system. Our results are presented for the elastic constants ($C_{11}$, $C_{12}$, $C_{44}$), elastic moduli ($B_u$, $Y_0$, $C_s$), internal strain (${\xi}$), bond stretching (${\alpha}$) and bond bending force (${\beta}$) parameters. The alloy of interest is found to be a direct semiconductor within the composition range 0 ${\leq}$ x ${\leq}$ 0.15 and an indirect one for 0.15 ${\le}$ x ${\leq}$ 1. There is a good agreement between our results and the experimental data for its constituents (AlP, AlSb, InP and InSb) which give support for the calculated results of the studied quaternary alloys.

• # Author Affiliations

1. Department of Physics, Faculty of Science, Mansoura University, PO Box 35516, Mansoura, Egypt

• # Bulletin of Materials Science

Volume 46, 2023
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020