OpenBTE：一个求解多维结构中声子输运的从头算方法
OpenBTE: a Solver for ab-initio Phonon Transport in Multidimensional Structures
摘要：
在纳米尺度上控制热流对于包括热能收集和热管理在内的若干应用是关键的。然而，工程纳米结构是具有挑战性的，因为声子边界的相互作用，而不是考虑傅立叶定律，必须考虑。非扩散模型，如玻尔兹曼输运方程（BTE），已被成功地用于捕捉复杂结构中的尺寸效应;然而，它们的广泛应用受到该领域开源求解器有限的阻碍。我们填补了这一空白，引入OpenBTE，一个有效的求解器的稳态声子BTE在多维结构。该工具与第一性原理计算接口，因此无需拟合参数即可解锁热相关属性的计算。作为一个例子，我们采用OpenBTE计算的温度和通量的地图，以及模式分辨，有效的热导率的硅膜具有无限和有限的厚度。通过解锁快速的纳米级热传输模拟，OpenBTE可能有助于加速热能应用的纳米材料设计。
英文摘要：
Controlling heat flow at the nanoscales is pivotal to several applications, including thermal energy harvesting and heat management. However, engineering nanostructures is challenging because phonon-boundary interaction, not contemplated by Fourier's law, must be taken into account. Nondiffusive models, such as the Boltzmann transport equation (BTE), have been successfully employed to capture size effects in complex structures; however, their widespread has been hindered by the limited offer of open-source solvers in this space. We fill this void by introducing OpenBTE, an efficient solver for the steady-state phonon BTE in multidimensional structures. This tool is interfaced to first-principles calculations, thus it unlocks the calculations of thermal-related properties with no fitting-parameters. As an example, we employ OpenBTE to compute the temperature and flux maps, as well as the mode-resolved, effective thermal conductivity of Si membranes with infinite and finite thickness. By unlocking fast nanoscale heat transport simulations, OpenBTE may help accelerate the design of nanomaterials for thermal energy applications.
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