Introduction
Ultra-low temperature high magnetic field scanning tunneling microscopy (STM) station is mainly composed of dilution refrigerator (DR), superconducting magnet, ultra-high vacuum system, vibration isolation-electromagnetic shielding unit and STM measurement unit. The base temperature of STM head can reach as low as 10 mK and the highest magnetic field is 20 T. By optimizing the RF filter, vibration damping and reducing the noise in the measurement electronics, the spatial resolution, energy resolution and stability of STM measurement can be enhanced to a competitive level. The home-made STM head is mounted on the bottom plate of the top-loading DR insert. The ultra-high vacuum system provides the in situ treatments of sample surface and growth of film materials.
Parameter
| Parameters | Values |
| Base temperature | 10 mK |
| Maximum magnetic | 20 T |
| Diameter of magnet bore | 100 mm |
| Continuous operating time | >200 h |
| Energy resolution | <0.1 meV |
Contact
Rui Wu, E-mail: wurui@iphy.ac.cn
