论文标题
在谐波驱动的分段frenkel-kontorova晶格中的热共振与下一个最邻居相互作用
Thermal resonance in harmonically driven segmented Frenkel-Kontorova lattices with next-nearest-neighbor interactions
论文作者
论文摘要
热运输问题无处不在，例如发电，冷却，电子和热电话等各种技术。在这种情况下，纳米级设备上的外部热通量控制自然而然地成为了近年来探索的一种吸引人的策略。在这项工作中，我们研究了热共振现象，即，通过外部周期性驾驶获得的最大热通量，由两个不同的Frenkel-Kontorva晶格组成的一维系统，与最近的NEIGHBOR（NN）和NNN NN连接到了连接的NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN在不同温度下工作。我们研究了NNN相互作用对模型可以进行的结构修饰所提供的各种热传输方案的影响。也研究了热共振对系统尺寸的依赖性。我们的结果表明，尽管NNN相互作用提供了双方的连通性，但系统的两个部分的声子的重叠仍然决定了频率范围，从而导致热共振出现。
Problems of heat transport are ubiquitous to various technologies such as power generation, cooling, electronics, and thermoelectrics. Within this context it is natural that external heat flux control on nanoscale devices became an appealing strategy that has been explored in recent years. In this work we study the thermal resonance phenomenon, i.e., the maximum heat flux obtained by means of an external periodic driving, of a one-dimensional system composed of two dissimilar Frenkel-Kontorva lattices with both nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions connected by time-modulated NN and NNN couplings in contact with two heat reservoirs operating at different temperature. We study the effect of the NNN interactions on the various heat transport regimes afforded by the structural modifications that can be made on the model. The dependence of the thermal resonance on the system size is studied as well. Our results show that, despite the increased connectivity of both sides afforded by the NNN interactions, the overlap of the phonon bands of both parts of the system still determines the frequency range wherewith thermal resonance emerges.
