A modular ultra-high vacuum millikelvin scanning tunneling microscope
A modular ultra-high vacuum millikelvin scanning tunneling microscope
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DOI：
10.1063/1.5132872
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发表时间：
2020-02-01
影响因子：
1.6
通讯作者：
Yazdani, Ali
中科院分区：
文献类型：
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作者：
Wong, Dillon;Jeon, Sangjun;Yazdani, Ali
我们描述了一种超高真空（UHV）扫描隧道显微镜（STM）的设计、构造和性能，该显微镜能够在稀释冰箱温度下成像，并配备了矢量磁铁。我们设计的主要目标是通过将STM系统划分为一组易于分离、可互换的组件来实现高水平的模块化。这自然地将STM仪器的特高压需求与稀释冰箱的典型非特高压结构分离开来，促进了非特高压材料的使用，同时保持了容纳STM的完全可烘烤的特高压室。模块化设计还允许从系统的其余部分快速移除显微镜头，允许维修，修改，甚至更换整个显微镜头，在任何时候都不需要加热低温恒温器或损害真空。在不使用低温滤波器的情况下，我们在超导Al（100）单晶上测量了184 mK的电子温度。
We describe the design, construction, and performance of an ultra-high vacuum (UHV) scanning tunneling microscope (STM) capable of imaging at dilution-refrigerator temperatures and equipped with a vector magnet. The primary objective of our design is to achieve a high level of modularity by partitioning the STM system into a set of easily separable, interchangeable components. This naturally segregates the UHV needs of STM instrumentation from the typically non-UHV construction of a dilution refrigerator, facilitating the usage of non-UHV materials while maintaining a fully bakeable UHV chamber that houses the STM. The modular design also permits speedy removal of the microscope head from the rest of the system, allowing for repairs, modifications, and even replacement of the entire microscope head to be made at any time without warming the cryostat or compromising the vacuum. Without using cryogenic filters, we measured an electron temperature of 184 mK on a superconducting Al(100) single crystal.