Acoustic-Phonon Transmission and Thermal Conductance in a Width-Change Quantum Waveguide

Abstract

Abstract: The authors investigate the effect of the value change of L on low temperature phonon transport in a width-change quantum waveguide by using the scattering-matrix method.The calculated results show that the transmission coefficient almost doesn’t change when the width of the quantum waveguide changes small,but it will become large with the value increase of L when the width of the quantum waveguide changes more.And at low temperature,the thermal conductance almost doesn’t change with the width-change of the quantum waveguide,but it will become large with the value increase of L when the temperature hoists.

Key words: phonon transport, thermal conductance, scattering-matrix method

YE Fu-Qiu, PENG Xiao-Fang. Acoustic-Phonon Transmission and Thermal Conductance in a Width-Change Quantum Waveguide[J]. journal6, 2009, 30(6): 59-62.

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