Nonlinear thermal control in an N-terminal junction

Details Nonlinear thermal control in an N-terminal junction Nonlinear thermal control in an N-terminal junction

2007-09-27

arxiv.org/abs/0709.4481v1

Phys. Rev. E 77, 021103 (2008)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevE.77.021103

We demonstrate control over heat flow in an N-terminal molecular junction. Using simple model Hamiltonians we show that the heat current through two terminals can be tuned, switched, and amplified, by the temperature and coupling parameters of external gating reservoirs. We discuss two models: A fully harmonic system, and a model incorporating anharmonic interactions. For both models the control reservoirs induce thermal fluctuations of the transition elements between molecular vibrational states. We find that a fully harmonic model does not show any controllability, while for an anharmonic system the conduction properties of the junction strongly depend on the parameters of the gates. Realizations of the model system within nanodevices and macromolecules are discussed.

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