| 螺旋纳米带中的声子输运 |
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| 引用本文： | 金蔚,惠宁菊,屈世显.螺旋纳米带中的声子输运[J].物理学报,2011,60(1):16301-016301. |
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| 作者姓名： | 金蔚 惠宁菊 屈世显 |
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| 作者单位： | 陕西师范大学理论与计算物理所,物理与信息技术学院,西安 710062 |
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| 基金项目： | 教育部重点基金(批准号:108118)资助的课题. |
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| 摘 要： | 运用微分几何方法及形式散射理论,研究螺旋纳米带中的标量声子输运问题,计算了声子透射系数及热导率.数值结果表明,弯曲导致了声子模式之间的量子干涉,使总透射系数随能量变化的量子化台阶呈现振荡行为,有效地抑制了热导率.
关键词：
螺旋纳米带
声子输运
形式散射理论
微分几何方法
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| 关 键 词： | 螺旋纳米带 声子输运 形式散射理论 微分几何方法 |
| 收稿时间： | 3/4/2010 12:00:00 AM |
| 修稿时间： | 4/9/2010 12:00:00 AM |
Phonon transport through helix nanobelts |
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| Jin Wei,Hui Ning-Ju,Qu Shi-Xian.Phonon transport through helix nanobelts[J].Acta Physica Sinica,2011,60(1):16301-016301. |
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| Authors: | Jin Wei Hui Ning-Ju Qu Shi-Xian |
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| Institution: | Institute of Theoretical & Computational Physics, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China;Institute of Theoretical & Computational Physics, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China;Institute of Theoretical & Computational Physics, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China |
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| Abstract: | Scalar phonon transport in helix nanobelts is studied by employing differential geometry method and formal scattering theory. Phonon transmission coefficients and thermal conductance are calculated. The numerical results reveal that curvature and torsion induce quantum interference between phonon modes, which makes the quantized stairs of the total transmission coefficient exhibit oscillation behavior which in turn suppresses the thermal conductance considerably. |
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| Keywords: | helix nanobelt phonon transport formal scattering theory differential geometry method |
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