Investigation of elastic moduli and constants of zinc-blende Al y Ga 1- y As alloy by statistical moment method

The elastic moduli and elastic constants of the ternary semiconductor alloy Al y Ga1-yAs at finite temperature have been investigated using the statistical moment method. The Young, shear, bulk moduli and elastic constants C11, C12, C44 of the zinc-blende Al y Ga1−yAs crystal are calculated as functions of Al composition and temperature. Numerical calculations have been performed and compared with those of the experimental and other theoretical results showing the reasonable agreements. Our study shows that elastic moduli and C11, C12 constants of zinc-blende Al y Ga1−yAs alloy are decreasing functions of the temperature and Al composition; C44 constant is a decreasing function of the Al composition.