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Yu, Ziqi; Li, Xiaopeng; Lee, Taehwa; Iizuka, Hideo
International journal of heat and mass transfer, 11/2022, Volume: 197Journal Article
•Compared to the bulk system, the near-field radiative heat transfer is significantly enhanced by incorporating multilayer Weyl semimetals when the rotation and the material loss are simultaneously modulated.•The heat transfer enhancement can be optimized by further tuning the off-diagonal component in the permittivity tensor of the Weyl semimetal.•The substantial heat transfer enhancement in the multilayer system is attributed to the strong surface states coupling and vanishing nonreciprocal surface plasmon polaritons when the system has mirror-symmetry and properly chosen material properties. Modulation of near-field heat transfer by introducing relative rotation has been previously demonstrated in a two-body system using bulk Weyl semimetals. Here, we first show that, compared with the bulk system, the heat transfer is significantly enhanced by incorporating multilayer Weyl semimetals when the rotation and the material loss are simultaneously modulated. With reduced loss, the multilayer systems having rotation angles of π on both bodies achieve much substantial enhancement than their counterparts in which the rotation angle of one body is 0. In addition, further tuning the off-diagonal components in the permittivity tensor of the Weyl semimetal allows an optimal enhancement. The considerable heat transfer enhancements in the multilayer system over the bulk system are attributed to the vanishing nonreciprocal surface plasmon polariton mode with the rotation of π and appropriately chosen material properties. Our results provide critical understanding on the heat transfer in multilayer Weyl semimetal systems.
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