论文标题
二维磁盘几何形状中的瞬态流体动力语音传输
Transient hydrodynamic phonon transport in two-dimensional disk geometry
论文作者
论文摘要
基于声子玻尔兹曼传输方程（BTE）研究了二维材料中的瞬时冷却现象。使用加热激光脉冲在环境温度下加热二维磁盘几何形状，在去除加热激光器后，我们的结果表明，瞬态温度可以低于环境温度，而这种瞬态冷却现象只能以足够的正常过程和不足的电阻式电阻式出现在声子流体动力学状态中。另外，理论上通过使用实验参数作为声子BTE的输入来讨论通过实验观察到的这种现象的可能性。结果表明，这种瞬态冷却现象显然可以出现在单层悬挂石墨烯磁盘中，直径为$ 50-150 $ k的温度范围内，直径为$ 7〜μ $ m。目前的工作可以为未来的二维材料中流体动力声子运输的实验证明提供理论指导。
Transient cooling phenomenon in two-dimensional materials is studied based on the phonon Boltzmann transport equation (BTE). Using a heating laser pulse to heat the two-dimensional disk geometry under the environment temperature, after the heating laser is removed, our results show that the transient temperature could be lower than the environment temperature and this transient cooling phenomenon could only appear in the phonon hydrodynamic regime with sufficient normal-process and insufficient resistive-process. In addition, the possibility of this phenomenon observed by experiments is theoretically discussed by using the experimental parameters as the input of the phonon BTE. Results show that this transient cooling phenomenon could obviously appear in a single-layer suspended graphene disk with diameter $7~μ$m in the temperature range of $50-150$ K. The present work could provide theoretical guidance for the future experimental proof of hydrodynamic phonon transport in two-dimensional materials.
