What is lattice vibration?
What is lattice vibration? Lattice Vibration is the oscillations of atoms in a solid about the equilibrium position. The vibration of these neighboring atoms is not independent of each other. A regular lattice with harmonic forces between atoms and normal modes of vibrations are called lattice waves. Why does lattice vibration occur? When the lattice is at equilibrium each atom is positioned exactly at its lattice site. Now suppose that an atom displaced from its equilibrium site by a small amount. Due to force acting on this atom, it will tend to return to its equilibrium position. This results in...