低温下三种凸型量子波导中的热输运  

THERMAL TRANSPORT IN THREE SORTS OF CONVEXITY QUANTUM WAVEGUIDES AT LOW TEMPERATURES

作　　者：李科敏[1] 苏卡林[1] 罗文华[1] 徐旭玲[1] 廖高华[1] 

机构地区：[1]湖南理工学院物理与电子学院,湖南岳阳414006

出　　处：《井冈山大学学报（自然科学版）》2010年第6期29-34,共6页Journal of Jinggangshan University (Natural Science)

基　　金：国家自然科学基金项目(10674044)

摘　　要：利用弹性近似模型和散射矩阵方法,对比研究了低温下的声学声子在等宽波导、变窄波导、变宽波导中的输运性质。计算结果表明,不同类型的凸型量子波导既有相似的性质也有各自的特点。这些性质有助于人们实现人工控制纳米结构中的热输运,同时为设计实用的声子滤波器提供理论参考。Based on the elastic approximation model and scattering matrix method,we do the comparative study the acoustic phonons transport in three sorts of convexity quantum waveguides which transverse widths of transmission phonon channels are equal to or bigger or smaller than that of incident phonon channels at low temperatures.The calculated results show that different types of the convexity quantum waveguides have both similar properties and their own characteristics.The results could be useful for controlling thermal transport in the nanostructures artificially and the design of the practical phonon filters.

关 键 词：热输运 凸型量子波导 散射矩阵方法 透射系数 凸型区域 

分 类 号：O431.2[机械工程—光学工程]