Four-phonon scattering dominates zone-center optical phonon linewidths in several materials at and above room temperature, and including it fixes previously underestimated infrared spectra.
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Role of higher-order phonon scattering in the zone-center optical phonon linewidth and the Lorenz oscillator model
Four-phonon scattering dominates zone-center optical phonon linewidths in several materials at and above room temperature, and including it fixes previously underestimated infrared spectra.