INTERFACE DYNAMICS UNDER THE ELASTIC FIELD

The interface equation of motion is derived in a system in which the local order parameter is coupled with the elastic strains. As a special case, the dynamics of spherical domains growing in a metastable matrix is studied. In a non-conserved system it is shown that larger domains grow dominantly around smaller domains when the shear modulus of the new phase is larger than that of the matrix, while the size difference of domains tends to diminish when they are softer than the matrix.