Ballistic near-field heat transport in dense many-body systems

Abstract : Radiative heat transport mediated by near-field interactions is known to be superdiffusive in dilute, many-body systems. Here we use a generalized Landauer theory of radiative heat transfer in many-body planar systems to demonstrate a nonmonotonic transition from superdiffusive to ballistic transport in dense systems. We show that such a transition is associated to a change of the polarization of dominant modes. Our findings are complemented by a quantitative study of the relaxation dynamics of the system in the different regimes of heat transport. This result could have important consequences on thermal management at nanoscale of many-body systems.
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Ivan Latella, Svend-Age Biehs, Riccardo Messina, Alejandro W. Rodriguez, Philippe Ben-Abdallah. Ballistic near-field heat transport in dense many-body systems. Physical Review B : Condensed matter and materials physics, American Physical Society, 2018, 97 (3), pp.35423. ⟨10.1103/PhysRevB.97.035423⟩. ⟨hal-01690614⟩

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