论文标题
Millikelvin扫描隧道显微镜的连接有多冷？
How cold is the junction of a millikelvin scanning tunnelling microscope?
论文作者
论文摘要
我们采用扫描隧道显微镜（STM），通过绝热的脱电力冰箱（ADR）冷却至millikelvin温度，以使用正常的和超导电的stm pistm proncondocecting状态，在AL（100）的原子清洁表面上对Al（100）的原子清洁表面上进行扫描隧道光谱法（STS）。改变ADR温度在30 MK至1.2 K之间，我们表明STM交界$ T $的温度与周围环境的温度$ T _ {\ Mathrm {Engrm {Eng}} $分离。使用$ p（e）$理论模拟STS数据，我们确定$ t _ {\ mathrm {env}}} \大约1.5 $ k，而超导间隙频谱的拟合产生的最低$ t = 77 $ mk。
We employ a scanning tunnelling microscope (STM) cooled to millikelvin temperatures by an adiabatic demagnetization refrigerator (ADR) to perform scanning tunnelling spectroscopy (STS) on an atomically clean surface of Al(100) in a superconducting state using normal-metal and superconducting STM tips. Varying the ADR temperatures between 30 mK and 1.2 K, we show that the temperature of the STM junction $T$ is decoupled from the temperature of the surrounding environment $T_{\mathrm{env}}$. Simulating the STS data with the $P(E)$ theory, we determine that $T_{\mathrm{env}} \approx 1.5$ K, while the fitting of the superconducting gap spectrum yields the lowest $T=77$ mK.
