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The article explores the complexities of umklapp and normal phonon-phonon scattering processes in lattice thermal conductivity, challenging the simplistic notion of momentum conservation that is often presented in textbooks. It emphasizes that the distinction between normal and umklapp processes is not as clear-cut as commonly thought, as it depends on the choice of the primitive cell in reciprocal space and the phonon group velocity. The authors advocate for a more nuanced understanding to clarify misconce

Author

Carolina Mendes Goncalves

Language

EN