Anharmonicity driven unusual particle-to-wave-like phonon crossover leads to ultralow thermal conductivity in Tl<sub>2</sub>AgI<sub>3</sub>.

Proc Natl Acad Sci U S A · 2026 · PMC12846769 · PMID 41564126

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closest p

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an increasing trendno p-value reported

Due to the significant phonon localization at higher temperatures, κ p decreases with temperature following T - 1 relationship, while κ c shows an increasing trend resulting in a particle-to-wave-like crossover at 175 K.

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Anharmonicity driven unusual particle-to-wave-like phonon crossover leads to ultralow thermal conductivity in Tl&lt;sub&gt;2&lt;/sub&gt;AgI&lt;sub&gt;3&lt;/sub&gt;.

The sentences

Anharmonicity driven unusual particle-to-wave-like phonon crossover leads to ultralow thermal conductivity in Tl<sub>2</sub>AgI<sub>3</sub>.