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Created page with "== Introduction == Phonons are quasiparticles that represent quantized modes of vibration occurring in a rigid crystal lattice, such as the atomic lattice of a solid. The study of phonons is an important part of solid state physics, because phonons play a crucial role in many of the physical properties of solids, such as the thermal conductivity and the electrical conductivity. == Quantum Mechanical Description == In quantum mechanics, phonons are described as a branch..."
