Strong Anharmonicity at the Origin of Anomalous Thermal Conductivity in Double Perovskite Cs2NaYbCl6

Abstract Anomalous thermal transport of Cs2NaYbCl6 double‐halide perovskite above room temperature is reported and rationalized. Calculations of phonon dispersion relations and scattering rates up to the fourth order in lattice anharmonicity have been conducted to determine their effective dependenc...

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Bibliographic Details

Published in:	Advanced Science
Main Authors:	Antonio Cappai, Claudio Melis, Daniela Marongiu, Francesco Quochi, Michele Saba, Francesco Congiu, Yihui He, Tyler J. Slade, Mercouri G. Kanatzidis, Luciano Colombo
Format:	Article
Language:	English
Published:	Wiley 2024-03-01
Subjects:	anharmonicity anomalous thermal transport double halide perovskite
Online Access:	https://doi.org/10.1002/advs.202305861