Quantum heat transfer through an atomic wire

Details Quantum heat transfer through an atomic wire Quantum heat transfer through an atomic wire

1999-08-13

arxiv.org/abs/cond-mat/9908204v1

Physics

Condensed Matter

14 pages, 2 separate figures

Scientific paper

10.1088/0953-8984/12/14/311

We studied the phononic heat transfer through an atomic dielectric wire with both infinite and finite lengths by using a model Hamiltonian approach. At low temperature under ballistic transport, the thermal conductance contributed by each phonon branch of a uniform and harmonic chain cannot exceed the well-known value which depends linearly on temperature but is material independent. We predict that this ballistic thermal conductance will exhibit stepwise behavior as a function of temperature. By performing numerical calculations on a more realistic system, where a small atomic chain is placed between two reservoirs, we also found resonance modes, which should also lead to the stepwise behavior in the thermal conductance.

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