One widely employed method to study thermoelectric effects in nano- and mesoscopic systems is by utilizing on-chip metal strips. However, the standard technique loses sensitivity in the sub-Kelvin temperature regime because the resistance of metal strips saturates. Here, we report a possible solution that can extend the working point from the conventional window (10 to 300 K) down to temperatures below 10 K. This method takes advantage of the unexpected resistance up-turn at T < 10 K in gold strips, presumably due to the Kondo effect. As a demonstration, we apply this technique to study a NbSe2 flake in the superconducting regime (<6 K).

中文翻译：

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将金属条的片上温度测量扩展到亚 10 K 范围

研究纳米和介观系统中热电效应的一种广泛采用的方法是利用片上金属条。然而，标准技术在亚开尔文温度范围内会失去灵敏度，因为金属条的电阻会饱和。在这里，我们报告了一种可能的解决方案，可以将工作点从传统窗口（10 到 300 K）扩展到低于 10 K 的温度。这种方法利用了金条中 T < 10 K 时意外的电阻上升，大概是由于近藤效应。作为演示，我们应用此技术来研究 NbSe2个超导状态下的薄片（<6 K）。