Exciton vs Phonon
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Exciton
An exciton is a bound state of an electron and positively charged "hole" created when an electron transitions to a higher energy level in a material, effectively behaving as a quasi-particle with properties like mass and momentum.
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Phonon
A phonon is a quasiparticle used in condensed-matter physics to describe a quantized collective vibration of atoms in a crystal lattice. Rather than representing a separate material particle, it is an excitation of a normal vibrational mode and can carry energy and crystal momentum through a solid. Phonons are central to explanations of heat capacity, thermal conductivity, sound propagation, and i...
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