Non-equilibrium phonon transport in surface-roughness dominated nanowires
نویسندگان
چکیده
منابع مشابه
Quantifying surface roughness effects on phonon transport in silicon nanowires.
Although it has been qualitatively demonstrated that surface roughness can reduce the thermal conductivity of crystalline Si nanowires (SiNWs), the underlying reasons remain unknown and warrant quantitative studies and analysis. In this work, vapor-liquid-solid (VLS) grown SiNWs were controllably roughened and then thoroughly characterized with transmission electron microscopy to obtain detaile...
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We present a novel approach for computing the surface roughness-limited thermal conductivity of silicon nanowires with diameter D<100 nm. A frequency-dependent phonon scattering rate is computed from perturbation theory and related to a description of the surface through the root-mean-square roughness height Delta and autocovariance length L. Using a full phonon dispersion relation, we find a q...
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ژورنال
عنوان ژورنال: Journal of Physics Communications
سال: 2019
ISSN: 2399-6528
DOI: 10.1088/2399-6528/ab4e22