论文标题
在和谐驱动的分段Frenkel-Kontorova lattices中的能量运输
Energy transport in harmonically driven segmented Frenkel-Kontorova lattices
论文作者
论文摘要
在这项工作中，我们研究了一个一维系统中的能量传输，该系统由两个不同的Frenkel-Kontorova晶格组成，该晶格通过时间调节的耦合连接，并通过分子动力学模拟与在不同温度下运行的两个热储层接触。有一个值的驱动频率值，即热通量采用其最大值，这是一种称为热共振的现象。晶格中的结构修饰强烈改变了外部驾驶与声子频带相互作用的方式。后者在模型的谐波状态下的重叠决定了共振出现的频率范围。还检查了传入热通量的参数依赖性，也可以检查到任何一个热库中的任何一个。我们的结果可能是针对设计热设备的进一步发展的导电。
In this work we study the energy transport in a one-dimensional system composed of two dissimilar Frenkel-Kontorova lattices connected by a time-modulated coupling and in contact with two heat reservoirs operating at different temperature by means of molecular dynamics simulations. There is a value of the driving frequency at which the heat flux takes its maximum value, a phenomenon termed as thermal resonance. Structural modifications in the lattice strongly alter the way in which the external driving interacts with the phonon bands. The overlap of the latter in the harmonic regime of the model determine the frequency range wherein resonance emerges. Parameter dependencies by which the incoming heat flux can be directed to either of the heat reservoirs are examined as well. Our results may be conductive to further developments in designing thermal devices.
