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We investigate the radiative heat transfer and spatial distributions ofstationary temperatures in periodic many-body systems composed of alternatingslabs of two different materials. We show that temperature distributionsexhibit an alternating spatial pattern and split into two distinct components,with each component corresponding to one of the two materials. Spatialtemperature variations following the periodicity of the structure can beattributed to a dual-channel photon heat exchange through a long-range couplingof electromagnetic modes supported by bodies of the same material. We alsoanalyze the thermal relaxation of the temperatures in the system to verifypotential applications in dynamical situations. The results reveal that tunablenonmonotonic temperature variations can be also designed and utilized at atransient mode. The dual-channel mechanism to control temperature distributionsproposed in the present work may pave new avenues for prospective applicationsin nano devices, especially for thermal photon-driven logic circuitry andthermal management.

Splitting of temperature distributions due to dual-channel photon heat exchange in many-body systems