论文标题
基于2D材料的设备中热传输中的流体动力特征：一项从头算研究
Hydrodynamic signatures in thermal transport in devices based on 2D materials: an ab initio study
论文作者
论文摘要
我们研究了具有有限热源的石墨烯和磷烯设备中流体动力效应所产生的特征，使用从头开始计算超越卡拉威的模型并为完整的线性散射操作员提供了信息，并通过基于能量的旋转型旋转式散射操作员通过基于能量的玻璃体传输方程。我们解释了创建那些流体动力特征的机制，表明边界散射和样品维度与非本地长度的关系是决定因素，无论正常散射的相对重要性如何。从这个角度来看，非局部长度反映了散射随机化热通量的能力，我们表明，散射操作员对散射量的近似值可能通过非局部长度的值，对水动力行为的特征的定性后果可能具有定性后果。
We investigate the features arising from hydrodynamic effects in graphene and phosphorene devices with finite heat sources, using ab initio calculations to go beyond Callaway's model and inform a full linearized scattering operator, and solving the phonon Boltzmann transport equation through energy-based deviational Monte Carlo methods. We explain the mechanisms that create those hydrodynamic features, showing that boundary scattering and the relation of sample dimensions to the nonlocal length are the determinant factors, regardless of the relative importance of normal versus resistive scattering. From this point of view, the nonlocal length reflects the ability of scattering to randomize the heat flux, and we show that approximations made on the scattering operator may have, through the value of nonlocal length, qualitative consequences on the signatures of hydrodynamic behavior.
