@article{Moore2008-ye, author = {A L Moore and S K Saha and Ravi S Prasher and L Shi}, title = {Phonon backscattering and thermal conductivity suppression in sawtooth nanowires}, abstract = {

The effect of\ surface roughness\ on\ phonon\ transport in a\ nanowire\ has often been described by treating the\ surface\ as flat with a specularity parameter\ $\ \ (\ \ p\ \)\ \ \$ \ in the range between 0 and 1. A lower\ thermal conductivity\ limit is approached at\ $\ \ p\ \ =\ \ 0\ \ \$ \ for diffuse\ surface.\ It is demonstrated here by\ Monte Carlo simulation\ that sawtooth roughness on a\ nanowire\ can cause\ phonon\ backscattering\ and suppress the\ thermal conductivity\ below the diffuse\ surface\ limit. The\ backscattering\ effect can be accounted for only by a negative\ $\ p\ \$ if the detail of the\ surface roughness\ is ignored.

}, year = {2008}, booktitle = {Appl. Phys. Lett.}, journal = {Appl. Phys. Lett.}, series = {Appl. Phys. Lett.}, month = {08/2008}, institution = {aip.scitation.org}, publisher = {aip.scitation.org}, doi = {10.1063/1.2970044}, language = {eng}, }