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- W3017328963 abstract "Electronic and phononic thermal conductivity are involved in the thermal conduction for metals and Wiedemann-Franz law is usually employed to predict them separately. However, Wiedemann-Franz law is shown to be invalid at intermediate temperatures. Here, to obtain the accurate thermal conductivity and Lorenz ratio for metals, the momentum relaxation time is used for electrical conductivity and energy relaxation time for electronic thermal conductivity. The mode-level first-principles calculation is conducted on two representative metals copper and aluminum. It is shown that the method can correctly predict electrical transport coefficients from 6 to 300 K. Also, the anomalous Lorenz ratio is observed within the present scheme, which has significant departure from the Sommerfeld value. The calculation scheme can be expanded to other metallic systems and is valuable in a better understanding of the electron dynamics and transport properties of metals." @default.
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- W3017328963 date "2020-11-10" @default.
- W3017328963 modified "2023-10-18" @default.
- W3017328963 title "Thermal conductivity and Lorenz ratio of metals at intermediate temperatures with mode-level first-principles analysis" @default.
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- W3017328963 doi "https://doi.org/10.1103/physrevb.102.174306" @default.
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