论文标题
基于通道的代数限制导电传热
Channel-based algebraic limits to conductive heat transfer
论文作者
论文摘要
接触时纳米级设备中探测相干的声子和电子传输的最新实验进步已基于基于非平衡的Green的功能形式主义的理论通道分析。已知通过每个通道的传输是由统一界定的，但是典型系统中的实际传输通常远低于这些限制。在最近推导的辐射传热极限和统一的形式主义的基础上，表征了在线性状态下的任意骨系统的热传输，我们提出了有关导电热传递的新界限。特别是，我们证明我们的限制通常比每个通道的Landauer限制更紧，并且通过检查一维链中的声子传导模型，接近实际的传输特征值。我们的限制对设计分子连接处的影响有后果，以优化传导。
Recent experimental advances probing coherent phonon and electron transport in nanoscale devices at contact have motivated theoretical channel-based analyses of conduction based on the nonequilibrium Green's function formalism. The transmission through each channel has been known to be bounded above by unity, yet actual transmissions in typical systems often fall far below these limits. Building upon recently derived radiative heat transfer limits and a unified formalism characterizing heat transport for arbitrary bosonic systems in the linear regime, we propose new bounds on conductive heat transfer. In particular, we demonstrate that our limits are typically far tighter than the Landauer limits per channel and are close to actual transmission eigenvalues by examining a model of phonon conduction in a 1-dimensional chain. Our limits have ramifications for designing molecular junctions to optimize conduction.
