Photon heat transport in low-dimensional nanostructures

Details Photon heat transport in low-dimensional nanostructures Photon heat transport in low-dimensional nanostructures

2007-01-15

arxiv.org/abs/cond-mat/0701334v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 Figs

Scientific paper

10.1103/PhysRevB.76.073414

At low temperatures when the phonon modes are effectively frozen, photon transport is the dominating mechanism of thermal relaxation in metallic systems. Starting from a microscopic many-body Hamiltonian, we develop a nonequilibrium Green's function method to study energy transport by photons in nanostructures. A formally exact expression for the energy current between a metallic island and a one-dimensional electromagnetic field is obtained. From this expression we derive the quantized thermal conductance as well as show how the results can be generalized to nonequilibrium situations. Generally, the frequency-dependent current noise of the island electrons determines the energy transfer rate.

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