Molecular Dynamic Calculation of the Bulk Modulus for Silicon and Silicon Carbide

A methodology for finding the bulk modulus using the molecular dynamics method is proposed. The influence of cluster size on the bulk modulus was analyzed. An increase in the bulk modulus with decreasing cluster size starting from a certain critical volume has been found. As a physical system, we considered a spherical cluster of silicon and silicon carbide with a zinc blende structure 3C-SiC.