Design and performance of a cryogenic scanning tunneling microscope in high magnetic field for 2D layered materials study

ORAL

Abstract

We will describe the design and performance of a cryogenic scanning tunneling microscope (STM) system in a high magnetic field. A Pan-type STM is mounted on a homemade low vibration 4He pot refrigerator, which can be operated in continuous flow mode at T $\sim$ 1.6K and in a magnetic field of up to 9 Tesla. A cleavage device at T$=$4.2K stage is used to cleave the 2D layered materials before inserting into STM as well as functioning as the radiation shield. The liquid helium boil rate of 4.6 liters per day is achieved due to our careful design, which allows the measurement at base temperature up to 10 days. We will demonstrate its capability of measuring atomically registered energy resolved spectroscopic maps in both real space and momentum space by our recent results on Rashba BiTeI.

*This work is supported by Ministry of Science and Technology, Taiwan and Kenda Foundation, Taiwan.

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Authors

  • Tien-Ming Chuang

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Pei-Fang Chung

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Syu-You Guan

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Shan-An Yu

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Che-An Liu

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Chia-Sheng Hsu

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Chih-Chuan Su

    • Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Raman Sankar

    • Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan

  • Fang-Cheng Chou

    • Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan