通过声波观察机械扭曲控制和产生声波
Kai Qian1,2, Nan Cheng3, Francesco Serafin3,4
1Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA, USA.
Nature communications
|February 6, 2026
概括
科学家们通过在特殊的拓超材料中使用声波来控制机械扭曲. 这一突破克服了以前的局限性,为高级应用程序提供了精确的控制和扭曲生成.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 宇宙学的宇宙学是什么?
- 材料科学是一种材料科学.
背景情况:
- 扭曲是不同基本状态之间的局部过渡,在各种科学领域至关重要.
- 之前试图用声波 (声波) 控制曲运动的尝试受到材料的隐蔽性和皮尔尔斯-纳巴罗屏障的限制.
- 仅观察到来自热声子或准静态负载的随机运动.
研究的目的:
- 通过实验观察声波介导的控制和产生机械扭曲.
- 为了研究声波包相互作用的动态与离散的扭曲.
- 克服皮尔尔斯-纳巴罗屏障对传统材料的限制.
主要方法:
- 采用了设计用于消除Peierls-Nabarro屏障的拓超材料,通过支持零能量扭曲来消除该屏障.
- 采用声波包 (小振幅机械波) 来与金克互动.
- 进行了计算模拟,以分析波包-扭曲相互作用的动态.
主要成果:
- 实现了对声波介导控制和产生机械扭曲的实验观测.
- 证明拓超材料消除了皮尔尔斯-纳巴罗屏障,促进了受控的相互作用.
- 揭示了独特的动态,包括长时间运动和连续的内部模式家族,在波包-曲相互作用中.
结论:
- 声波可以确定性地控制并产生拓超材料中的机械扭曲.
- 消除皮尔尔斯-纳巴罗障碍是实现受控的语音-曲相互作用的关键.
- 这项工作为远程扭曲控制提供了可能性,在调节度,形状变形和信号传输方面有应用.
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