Calculation of Si nanowire thermal conductivity using complete phonon dispersion relations

2003/08/27 by Natalio Mingo, N. Mingo · 2 citations
Materials Science · Physics and Astronomy · #Mechanical and Optical Resonators #Semiconductor Quantum Structures and Devices #Thermal properties of materials #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.68.113308

published as Phys. Rev. B 68, 113308 (2003) · 4 pages, 3 figures. Accepted in Phys. Rev. B

arxiv created 2003/08/27 · openalex publication_date 2003/09/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The lattice thermal conductivity of crystalline Si nanowires is calculated. The calculation uses complete phonon dispersions, and does not require any externally imposed frequency cutoffs. No adjustment to nanowire thermal conductivity measurements is required. Good agreement with experimental results for nanowires wider than 35 nm is obtained. A formulation in terms of the transmission function is given. Also, the use of a simpler, nondispersive ``Callaway formula,'' is discussed from the complete dispersions perspective.

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