• numerical analysis of the boundary scattering effect on transport properties in bi-sb nanowires

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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    • شماره تماس دبیرخانه رویداد: -
     in this study, we have numerically analyzed the transport properties of bi-sb nanowires, taking into account wire boundary scattering. wire boundary scattering slightly decreased the seebeck coefficient of bi-sb nanowires. this effect is due to the observation that boundary scattering and the mobility ratio of l-point electrons to t-point holes in the nanowires are smaller than those in bulk bi-sb because the wire boundary scattering suppresses the mobilities of l-point electrons and heavy holes. the largest seebeck coefficient for all wire diameters was obtained when the sb concentration was 5 at.%. the effective mass approached zero near 5 at.% sb, and the small effective mass led to a large subband shift in each band. thus, a small effective mass enhances the quantum effect at a fixed wire diameter, even if wire boundary scattering is taken into account.

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