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Abstract: The maximal value of thermal conductivity \kappa {max} of the perfect wurziteGaN crystal containing isotopes of natural abundance is estimated. Our upperlimit of \kappa=4800 W-Km at T {max}=32 K is smaller than calculated by Liu andBalandin \kappa=6000 W-Km and higher than obtained by Slack et al \kappa=3750W-Km. The phenomenological dependence \kappa \propto T^{-1.43} obtained by Mionet al for the temperature interval 300-450 K is extended to 200-300K. Fortemperatures higher than T max the best fitting of our experimental data toCallaway-s formula is obtained for Grueneisen-s constant equal to \gamma =1.35.



Author: B. A. Danilchenko, I. A. Obukhov, T. Paszkiewicz, S. Wolski, A. Jezowski

Source: https://arxiv.org/



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