Development and Performance of a 300mK-16Tesla Spectroscopic Imaging - Scanning Tunneling Microscope for Quantum Materials Research
Cheng-Li Chiu1*, Yun Yen1,2, Tzu-Chao Hung1, Syu-You Guan1, Tien-Ming Chuang1
1Institute of Physics, Academia Sinica, Taipei, Taiwan
2Department of Physics, National Taiwan university, Taipei, Taiwan
* Presenter:Cheng-Li Chiu,
The development of scanning tunneling microscope (STM) under low temperature and high magnetic field has been motivated by studying the novel phenomena of quantum materials under such extreme conditions. We will describe the design and the performance of a 3He-based spectroscopic imaging (SI) – STM system. The compact STM head is mounted on a single shot 3He fridge in a 16Tesla magnet dewar, which allows us to measure the sample at 300mK for ~4days. The SI-STM is installed in an acoustic-shielding ultralow vibration laboratory to minimize the mechanical vibration and thermal drift during the spectroscopic mapping. We will demonstrate its capability of measuring atomically registered energy resolved spectroscopic maps and also the energy resolution of tunneling spectroscopy at 300mK.
This work is supported by Ministry of Science and Technology, Academia Sinica and Kenda Foundation.

Keywords: STM, Cryogenics, Vacuum