Strain coupling as the dominant interaction in structural phase transitions

摘要: Abstract A rigorous theory is developed for the ordering interaction J(R ij) in a crystal having structural phase transition when mediated by elastic relaxation material. The process cell i sets up local stress field due to sizes, shapes or displacements of atoms atomic groups, which propagates elastically distant j. atomistic ferro-and antiferro-elastic transitions takes into account two types singularity, one anisotropy and other Zener Jz infinite range ferroelastic transitions, as well self-energy around each cell. Four case are distinguished fora simple cubic model, between them encompass phenomena much more complex situations. JK Fourier space dominated whether not domain walls perpendicular k have low energy from their strain satisfying Sapriel's compatibility relations. Thus embryonic tweed texture fluctuation...