Phonon-Phonon Interactions in Strongly Bonded Solids: Selection Rules and Higher-Order Processes
Navaneetha K. Ravichandran, David Broido
Abstract
The commonly used three-phonon approximation for describing phonon collisions in crystals can fail to describe heat transport in common materials, but including collisions among four phonons offers much better matches to measurements.
Topics & Concepts
PhononAnharmonicityCondensed matter physicsScatteringMaterials scienceThermal conductivityOrder (exchange)SemiconductorPhysicsQuantum mechanicsOptoelectronicsEconomicsFinanceComposite materialThermal properties of materialsMachine Learning in Materials ScienceHigh-pressure geophysics and materials