| 边界条件对介电量子波导中声子输运性质的影响 |
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| 引用本文： | 唐黎明,王艳,王丹,王玲玲.边界条件对介电量子波导中声子输运性质的影响[J].物理学报,2007,56(1):437-442. |
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| 作者姓名： | 唐黎明 王艳 王丹 王玲玲 |
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| 作者单位： | 湖南大学应用物理系,长沙,410082 |
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| 基金项目： | 高等学校博士学科点专项科研项目;湖南省自然科学基金 |
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| 摘 要： | 运用散射矩阵方法，研究了Neumann边界条件和Dirichlet边界条件在低温下对结构不连续的纳米结构中的声学声子输运系数的影响.数值结果表明，当边界条件不同时，声学声子输运系数会有极大的不同；在一定的结构条件下，由于声子模与模的耦合作用，出现了共振透射和禁止频带.
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| 关 键 词： | 声子输运 介观体系 边界效应 |
| 文章编号： | 1000-3290/2007/56(01)/0437-06 |
| 收稿时间： | 2006-03-14 |
| 修稿时间： | 4/3/2006 12:00:00 AM |
Effect of boundary conditions on phonon transmission in a dielectric quantum waveguide |
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| Tang Li-Ming,Wang Yan,Wang Dan,Wang Ling-Ling.Effect of boundary conditions on phonon transmission in a dielectric quantum waveguide[J].Acta Physica Sinica,2007,56(1):437-442. |
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| Authors: | Tang Li-Ming Wang Yan Wang Dan Wang Ling-Ling |
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| Institution: | Department of Applied Physics, Hunan University, Changsha 410082, China |
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| Abstract: | We investigate the effect of boundary conditions on the low temperature phonon transport in a quantum waveguide with structural defects by using the scattering-matrix method. A comparison between transmission coefficients is made when Neumann and Dirichlet boundary conditions are applied for acoustic modes, respectively. The result indicates that the behavior of the transmission coefficient versus reduced phonon frequency is qualitatively different for different boundary conditions. The stop-frequency gap and the transmission resonance are observed for certain structural parameters due to mode-mode coupling. |
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| Keywords: | phonon transport mesoscopic systems boundary effect |
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