Suppressing phonon transport in nanowires: A simple model for phonon-surface-roughness interaction

Article

关键词: QUANTUM-WELL STRUCTURES;    SILICON NANOWIRES;    THERMOELECTRIC-MATERIALS;    THERMAL-CONDUCTIVITY;    MOLECULAR JUNCTIONS;    FIGURE;    MERIT;   

DOI  :  10.1103/PhysRevB.96.075403

来源: SCIE

【 摘 要 】

Suppressing phonon propagation in nanowires is an essential goal towards achieving efficient thermoelectric devices. Recent experiments have shown unambiguously that surface roughness is a key factor that can reduce the thermal conductivity well below the Casimir limit in thin crystalline silicon nanowires. We use insights gained from the experimental studies to construct a simple analytically tractable model of the phonon-surface-roughness interaction that provides a better theoretical understanding of the effects of surface roughness on the thermal conductivity, which could potentially help in designing better thermoelectric devices.

【 授权许可】

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