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Effects of ballistic transport on the thermal resistance and temperature profile in nanowires

Author

Listed:
  • R. Meyer

    (Laurentian University)

  • Graham W. Gibson
  • Alexander N. Robillard

    (Laurentian University)

Abstract

Effects of ballistic transport on the temperature profiles and thermal resistance in nanowires are studied. Computer simulations of nanowires between a heat source and a heat sink have shown that in the middle of such wires the temperature gradient is reduced compared to Fourier’s law with steep gradients close to the heat source and sink. In this work, results from molecular dynamics and phonon Monte Carlo simulations of the heat transport in nanowires are compared to a radiator model which predicts a reduced gradient with discrete jumps at the wire ends. The comparison shows that for wires longer than the typical mean free path of phonons the radiator model is able to account for ballistic transport effects. The steep gradients at the wire ends are then continuous manifestations of the discrete jumps in the model. Graphical abstract

Suggested Citation

  • R. Meyer & Graham W. Gibson & Alexander N. Robillard, 2024. "Effects of ballistic transport on the thermal resistance and temperature profile in nanowires," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(6), pages 1-13, June.
    • Handle: RePEc:spr:eurphb:v:97:y:2024:i:6:d:10.1140_epjb_s10051-024-00727-y
    DOI: 10.1140/epjb/s10051-024-00727-y
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    References listed on IDEAS

    as
    1. Keith T. Regner & Daniel P. Sellan & Zonghui Su & Cristina H. Amon & Alan J.H. McGaughey & Jonathan A. Malen, 2013. "Broadband phonon mean free path contributions to thermal conductivity measured using frequency domain thermoreflectance," Nature Communications, Nature, vol. 4(1), pages 1-7, June.
    2. Martin Maldovan, 2013. "Sound and heat revolutions in phononics," Nature, Nature, vol. 503(7475), pages 209-217, November.
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