异侧非重叠三封闭端量子波导中的声子输运与热导  

Phonon transmission and thermal conductance in a quantum waveguide with three stubs

作　　者：张剑华[1] 

机构地区：[1]湘南学院物理与电子信息工程系,郴州423000

出　　处：《原子与分子物理学报》2011年第4期703-709,共7页Journal of Atomic and Molecular Physics

基　　金：湖南省教育厅基金(09C920)

摘　　要：研究了异侧非重叠三封闭端量子波导中的声学声子传输和热导率性质.结果表明:由于激发模的产生,总传输系数在整数约化频率的时发生跳跃;各个激发模所产生的温度条件不一样,温度越高,被激发的模越多,并且高阶模对热导的影响较小;声子传输和热导性质与不连续结构的形状和位置有直接的关系,声子传输和热导性质对量子线的温度环境相当敏感.Then we study the acoustic phonon transmission and thermal conductance in a quantum waveguide with non-overlapping three stubs in dfferent sides using the scattering matrix method, it is found that an abrupt jump is always located just at an integer-reduced frequency because of new excited phonon mode; the higher the temperature, the more the excited phonon modes. In conclusion, the phonon transmission and thermal conductance have direct relationship with the shape and location of structure and temperature environment.

关 键 词：低维纳米结构 散射矩阵方法 声学声子输运 热导 

分 类 号：O426.5[理学—声学]