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在量子系统中散射的纳米级热成像
D Halbertal1, J Cuppens1,2, M Ben Shalom3,4
1Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7610001, Israel.
Nature
|November 4, 2016
概括
科学家开发了一种高度灵敏的纳米级温度计, 在极低的温度下进行前所未有的热成像.
科学领域:
- 凝聚物质物理
- 量子力学
- 纳米技术
背景情况:
- 能量消耗对于理解量子系统至关重要, 但难以在纳米尺度上测量.
- 现有的热成像方法缺乏量子研究所需的灵敏度和低温能力.
研究的目的:
- 开发一种高度灵敏的纳米级温度计,用于测量量子系统中的能耗.
- 使纳米级能量散射过程的直接热成像成为可能.
主要方法:
- 使用直径小于50nm的超导量子干扰装置 (SQUID) 开发纳米温度计.
- 使用扫描冷却式热传感器,灵敏度低于1μKHz-1/2.
- 非接触式,非侵入式的温度计,用于低至40 fW的成像散射.
主要成果:
- 与之前的设备相比, 获得了四倍的灵敏度.
- 在量子点和石墨烯中实现纳米级能量散射的热成像.
- 由于单电子充电和共振局部状态而观察到的散射变化.
结论:
- 开发的纳米温度计为纳米级热成像提供了前所未有的灵敏度.
- 这项技术为研究量子物质中的能量消耗开辟了新的途径.
- 现在可以直接观察量子系统中的散射机制.
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