论文标题
Weyl半含量纳米颗粒之间的负差分电导通过真空
Negative differential thermal conductance between Weyl semimetals nanoparticles through vacuum
论文作者
论文摘要
在这项工作中，研究了两个Weyl半分（WSM）纳米颗粒（NP）之间的近场辐射传热（NFRHT）。数值结果表明，在该系统中可以获得负差分导热（NDTC）效应，即当固定发射器的温度时，随着接收器温度的升高，热通量不会单调降低。具体而言，当发射极的温度为300 K时，当接收器的温度为50 K或280 K时，热通量是相同的。NDTC效应归因于以下事实：WSMS的介电性随温度而变化。在不同温度下进一步鉴定了两个WSM NP的极化率的耦合效应，以揭示NDTC效应的物理机制。此外，通过激发局部等离子体模式和圆形模式，可以大大增强两个Weyl WSM NP之间的NFRHT。这项工作表明，WSM可能有望操纵NFRHT的候选材料。
In this work, the near-field radiative heat transfer (NFRHT) between two Weyl semimetal (WSM) nanoparticles (NPs) is investigated. The numerical results show that negative differential thermal conductance (NDTC) effect can be obtained in this system, i.e., when the temperature of the emitter is fixed, the heat flux does not decrease monotonically with the increase of the temperature of the receiver. Specifically, when the temperature of the emitter is 300 K, the heat flux is identical when the temperature of the receiver is 50 K or 280 K. The NDTC effect is attributed to the fact that the permittivity of the WSMs changes with the temperature. The coupling effects of polarizability of two WSM NPs have been further identified at different temperature to reveal the physical mechanism of the NDTC effect. In addition, the NFRHT between two Weyl WSM NPs can be greatly enhanced by exciting the localized plasmon and circular modes. This work indicates that the WSMs maybe promising candidate materials for manipulating NFRHT.
