论文标题
扭曲双曲线抗铁磁铁中的近场辐射热开关
Twisting the near-field radiative heat switch in hyperbolic antiferromagnets
论文作者
论文摘要
我们研究了外部磁场下两个双曲线抗铁磁绝缘子之间近场辐射热传递的扭曲控制。我们表明，近场热通量可能会受到扭曲角$θ$和具有不同断裂对称性的施加磁场的幅度的影响。无论扭曲角度如何，外部磁场都会导致辐射热通量非单调地变化，并且最小热通量可以使用约1.5 t的磁场发现。这种非单调的行为是由于磁场可以从根本上改变磁场的性质，而磁场可以随时间反向对称性破裂而从根本上改变磁极的性质。该场不仅会影响表面镁极化子的拓扑结构，而且还会诱导体积的镁极化子，随着场的增加而逐渐主导热传递。我们进一步提出了带有反转对称性破坏的扭曲引起的热开关设备，该设备可以严格调节辐射热通量通过不同的磁场。我们的发现解释了辐射传热的特征调制，对动态热管理中的应用产生了影响。
We study the twisted control of the near-field radiative heat transfer between two hyperbolic antiferromagnetic insulators under external magnetic fields. We show that the near-field heat flux can be affected by both the twist angle $θ$ and the magnitude of the applied magnetic field with different broken symmetries. Irrespective of twist angle, the external magnetic field causes the radiative heat flux to change nonmonotonically, and the minimum heat flux can be found with the magnetic fields of about 1.5 T. Such nonmonotonic behavior is due to the fact that the magnetic field can radically change the nature of the magnon polaritons with time reversal symmetry breaking. The field not only affects the topological structure of surface magnon polaritons, but also induces the volume magnon polaritons that progressively dominate the heat transfer as the field increases. We further propose a twist-induced thermal switch device with inversion symmetry breaking, which can severely regulate radiative heat flux through different magnetic fields. Our findings account for a characteristic modulation of radiative heat transfer with implications for applications in dynamic thermal management.
