Wong Dillon, Jeon Sangjun, Nuckolls Kevin P, Oh Myungchul, Kingsley Simon C J, Yazdani Ali
Joseph Henry Laboratories and Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Oxford Instruments, Tubney Woods, Abingdon, Oxfordshire OX13 5QX, United Kingdom.
Rev Sci Instrum. 2020 Feb 1;91(2):023703. doi: 10.1063/1.5132872.
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.
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制冷机温度下成像，并配备了矢量磁体。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度模块化。这自然地将STM仪器的超高真空需求与稀释制冷机通常的非超高真空构造分离开来，便于使用非超高真空材料，同时保持容纳STM的完全可烘烤的超高真空腔室。模块化设计还允许快速将显微镜头从系统的其余部分移除，从而能够随时进行维修、修改，甚至更换整个显微镜头，而无需加热低温恒温器或破坏真空。在不使用低温滤波器的情况下，我们在超导Al(100)单晶上测量到电子温度为184 mK。
