Coupled electron and phonon transport in one-dimensional atomic junctions

Details Coupled electron and phonon transport in one-dimensional atomic junctions Coupled electron and phonon transport in one-dimensional atomic junctions

2007-04-05

arxiv.org/abs/0704.0723v1

Phys. Rev. B 76, 165418 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 7 figures

Scientific paper

10.1103/PhysRevB.76.165418

Employing the nonequilibrium Green's function method, we develop a fully quantum mechanical model to study the coupled electron-phonon transport in one-dimensional atomic junctions in the presence of a weak electron-phonon interaction. This model enables us to study the electronic and phononic transport on an equal footing. We derive the electrical and energy currents of the coupled electron-phonon system and the energy exchange between them. As an application, we study the heat dissipation in current carrying atomic junctions within the self-consistent Born approximation, which guarantees energy current conservation. We find that the inclusion of phonon transport is important in determining the heat dissipation and temperature change of the atomic junctions.

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