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在纳米设备中直接观察热电子增强的热电效应

Huanyi Xue¹, Ruijie Qian^1,2, Weikang Lu^1,3

¹State Key Laboratory of Surface Physics and Department of Physics, Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, 200433, Shanghai, People's Republic of China.

Nature communications

|June 22, 2023

概括

研究人员可视化了纳米收缩中的热电效应,观察了电子和晶格之间的显著温度差异. 这一发现对于推进电子产品中纳米级热管理至关重要.

科学领域:

固态物理固态物理
纳米技术纳米技术
材料科学是一种材料科学.

背景情况:

热电效应对于微型电子产品的热管理至关重要.
纳米热度测量使得纳米材料的微观温度分析成为可能.
(Si) 纳米器件中的热电效应仍未得到充分研究.

研究的目的:

为了研究纳米收缩中的非平衡热电效应.
在Si纳米设备中可视化和量化电子和晶格温度.
探索热载体在提高热电性能方面的潜力.

主要方法:

电子温度 (T_e) 和晶格温度 (T_L) 的纳米热度成像.
纳米构造装置的制造和特征.
在电流下对热电现象进行定量分析.

主要成果:

在Si纳米收缩中,在电子热点附近突出的热电效应的直接可视化.
观察到的电子温度 (T_e~1500 K) 显著超过格子温度 (T_L~320 K).
证明热电效应对电流的第三级依赖,与理论一致.

结论:

中的不平衡热载体表现出显著的热电行为.
这些发现为后穆尔电子产品的纳米级热管理提供了新的见解.
利用热载体来提高基于Si的设备的热电性能的潜力.

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