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- W2023647560 abstract "Acoustic-phonon transmission and thermal conductance in a double-bend quantum waveguide at low temperatures are investigated with the use of the scattering matrix method. The calculated results show that the total transmission coefficient versus the reduced phonon frequency exhibits a series of resonant peaks and dips. The stop-frequency gap can be observed for certain structural parameters due to the mode-mode coupling in the bend region. The universal quantum thermal conductance and the decrease of the thermal conductance at very low temperatures can be clearly observed. However, for higher temperatures where the higher transverse modes are excited, the reduced thermal conductance K∕T is proportional to temperature T. The transmission coefficient and thermal conductance sensitively depend on the geometric parameters of the double bend, which provide an efficient way to control thermal conductance artificially by adjusting the parameters of the proposed microstructures." @default.
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- W2023647560 date "2005-11-01" @default.
- W2023647560 modified "2023-09-22" @default.
- W2023647560 title "Acoustic-phonon transmission and thermal conductance in a double-bend quantum waveguide" @default.
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- W2023647560 doi "https://doi.org/10.1063/1.2127122" @default.
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