论文标题
石墨烯和六角硼的扭曲均匀界面中可控的导热率
Controllable Thermal Conductivity in Twisted Homogeneous Interfaces of Graphene and Hexagonal Boron Nitride
论文作者
论文摘要
发现石墨的均匀扭曲堆栈的热导率很大程度上取决于不合适的角度。基本机制依赖于扭曲界面上的声子轴耦合的角度依赖性。计算出的狭窄石墨堆栈的热导率与相应的实验结果之间的良好一致性表明了预测的有效性。这归因于使用专用注册表依赖性层中势的层间相互作用描述的准确性。 H-BN堆栈的相似结果表明总体电导率较高，而失配角变化降低。这为设计可调的异质连接的设计开辟了道路，其可控的热传输特性从底物 - 隔离到有效的热疏散。
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 interactions 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.
