Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 93: Plasmonics & Nanooptics VI: Near-Field Microscopy and Phenomena
O 93.10: Vortrag
Freitag, 5. April 2019, 12:45–13:00, H8
Limitations of the kinetic theory to describe the near-field heat exchanges in many-body systems — •Christoph Kathmann1, Riccardo Messina2, Philippe Ben-Abdallah2, and Svend-Age Biehs1 — 1Institut für Physik, Carl von Ossietzky Universität, Oldenburg, Deutschland — 2Institut d'Optique, CNRS, Université Paris-Saclay, Palaiseau, Frankreich
Kinetic theory based on solving Boltzmann equation is widely used to calculate heat fluxes in complex many-body systems on the nanoscale[1]. We compare this approach to an exact Landauer approach based on fluctuating electrodynamics[2] for a simple many-body system, namely a onedimensional chain consisting of nanoparticles. We find that the kinetic approach generally fails to predict heat fluxes in such a system, for polar nanoparticles we observe poor spectral agreement and a different scaling with the distance between the particles while for metallic nanoparticles the kinetic approach completely fails[3]. References: [1] J. Ordonez-Miranda, L. Tranchant, S. Gluchko, und S. Volz, Energy transport of surface phonon polaritons propagating along a chain of spheroidal nanoparticles, Phys. Rev. B 92, 115409 (2015). [2] R. Messina, M. Tschikin, S.-A. Biehs, und P. Ben-Abdallah, Fluctuation-electrodynamic theory and dynamics of heat transfer in systems of multiple dipoles, Phys. Rev. B 88, 104307 (2013). [3] C. Kathmann, R. Messina, P. Ben-Abdallah, S.-A. Biehs, Limitations of kinetic theory to describe near-field heat exchanges in many-body systems, Phys. Rev. B 98, 115434 (2018).