By monitoring the lattice dynamics of single-crystal argyrodite Ag8SnSe6 through the superionic transition, low thermal conductivity and ionic transport are found to arise from extreme phonon anharmonicity.
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de Boissieu, M. A deeper look into argyrodite phonons. Nat. Mater. 22, 931–932 (2023). https://doi.org/10.1038/s41563-023-01605-1
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DOI: https://doi.org/10.1038/s41563-023-01605-1