促进安德森定位低频电话在SIGE合金纳米线中,具有远程相关障碍
Wei Zhang1,2, Shiyun Xiong3, Yangyu Guo1
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
ACS nano
|October 13, 2025
概括
SiGe纳米线中的远程Ge相关性抑制低频声波传输,使安德森定位成为可能. 这可以将导热率降低高达60%,并推进热管理技术.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 波恩·安德森定位是热管理和能源采集的关键.
- 雷利散射控制了具有点乱的材料中的声子传输.
- 在低维系统中控制声子传输是具有挑战性的.
研究的目的:
- 研究实现低频声波安德森定位的设计原则.
- 探索SiGe纳米线中Ge空间分布对声子传输的影响.
- 为了降低纳米结构中的导热率.
主要方法:
- 没有平衡 格林函数 (NEGF) 方法.
- 在SiGe纳米线中模拟声子传输,具有不同的Ge空间相关性.
- 对声子传输,局部化频率和热导率的分析.
主要成果:
- 长距离的Ge相关性显著抑制低频声波传输 (<2 THz).
- 波安德森定位实现了0.6 THz,比随机系统更强.
- 由于压抑的声子传输,热导率降低了高达60%.
- 从弹道到扩散的声音传输的过渡观察到与空间相关性.
结论:
- 在Ge分布中的空间相关性对于诱导低频声波安德森定位至关重要.
- 这种方法为设计纳米结构的热特性提供了一条途径.
- 研究结果提供了关于无序的低维系统中传热机制的见解.
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