Acoustic phonon transport through a double-bend quantum waveguide
Abstract
In this work, using the scattering matrix method, we have investigated the transmission coefficients and the thermal conductivity in a double-bend waveguide structure. The transmission coefficients show strong resonances due to the scattering in the midsection of a double-bend structure; the positions and the widths of the resonance peaks are determined by the dimensions of the midsection of the structure. And the scattering in the double-bend structure makes the thermal conductivity decreases with the increasing of the temperature first, then increases after reaches a minimum. Furthermore, the investigations of the multiple double-bend structures indicate that the first additional double-bend structure suppresses the transmission coefficient and the frequency gap formed; and the additional double-bend structures determine the numbers of the resonance peaks at the frequency just above the gap region. These results could be useful for the design of phonon devices.
Cite
@article{arxiv.0710.0916,
title = {Acoustic phonon transport through a double-bend quantum waveguide},
author = {Yi Ming and Zhexian Wang and Zejun Ding},
journal= {arXiv preprint arXiv:0710.0916},
year = {2007}
}
Comments
13 pages, 6 figures, elsart.cls is used