Linked from
The 40 pages that link to Phonon, each with the reason it gives.
Thermal conductionRelated: Phonons carry much of the heat through electrically insulating crystals.
BCS theoryRelated: Phonons are the lattice excitations that mediate conventional pairing.
Carbon nanotubeRelated: Phonons carry heat through a nanotube’s carbon lattice.
Solid-state physicsRelated: Phonons carry heat and scatter electrons in crystalline materials.
Beryllium oxideRelated: Phonons carry much of the heat through crystalline BeO.
Terahertz radiationRelated: Lattice phonons often interact strongly with terahertz radiation.