Thermal conductivity of homogeneous twisted stacks of graphite is found to strongly depend on the misfit angle. The underlying mechanism relies on the angle dependence of phonon–phonon couplings across the twisted interface. Excellent agreement between the calculated thermal conductivity of narrow graphitic stacks and corresponding experimental results indicates the validity of the predictions. This is attributed to the accuracy of interlayer interaction descriptions obtained by the dedicated registry-dependent interlayer potential used. Similar results for h-BN stacks indicate overall higher conductivity and reduced misfit angle variation. This opens the way for the design of tunable heterogeneous junctions with controllable heat-transport properties ranging from substrate-isolation to efficient heat evacuation.

中文翻译：

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石墨烯和六方氮化硼扭曲同质界面中的可控导热系数。

发现均匀扭曲的石墨堆叠的热导率在很大程度上取决于失配角。潜在的机制依赖于扭曲界面上声子-声子耦合的角度依赖性。窄石墨叠层的导热系数与相应的实验结果之间的极好的一致性表明了预测的有效性。这归因于通过使用专用的依赖注册表的中间层电势获得的中间层交互描述的准确性。h-BN堆的类似结果表明，整体导电性更高，错配角变化减小。这为设计具有可控传热特性（从衬底隔离到有效排热）的可调异质结开辟了道路。