Negative differential thermal resistance induced by ballistic transport

Details Negative differential thermal resistance induced by ballistic transport Negative differential thermal resistance induced by ballistic transport

2009-05-23

arxiv.org/abs/0905.3792v1

Phys. Rev. E 79, 050103 (R) (2009)

Physics

Biological Physics

Scientific paper

10.1103/PhysRevE.79.050103

Using nonequilibrium molecular-dynamics simulations, we study the temperature dependence of the negative differential thermal resistance that appears in two-segment Frenkel-Kontorova lattices. We apply the theoretical method based on Landauer equation to obtain the relationship between the heat current and the temperature, which states a fundamental interpretation about the underlying physical mechanism of the negative differential thermal resistance. The temperature profiles and transport coefficients are demonstrated to explain the crossover from diffusive to ballistic transport. The finite-size effect is also discussed.

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