In this chapter, the authors summarize journey in semiconductor physics and explores possibilities of novel atomic process induced by electronic excitation with attention to modification of the structure and search for new structures. The electron–lattice interaction is originated from the imbalance in the interatomic force mediated by valence electrons generated by electronic excitation, showing the difference of the stable positions in the electronic ground and excited states in semiconductors. When the interaction between a carrier (conduction electron, valence hole) and the lattice (phonon) is weak, the effects can be treated as a weak perturbation. The coupling constant of the electron—lattice interaction is specific to material itself; then it is difficult to control.