Scanning tunneling microscopy (STM) measures tunneling currents into solid surfaces with sub-atomic resolution, which deliver information on the atomic structures and electronic states of the topmost layer of a crystal. We have a collection of STM's covering different temperature ranges and with different capabilities such as magnetic field, AFM, and spin polarization.
Ultra-Low Temperature Scanning Tunneling Microscope with 3D High-field Magnet
We developed a STM based on UHV dilution refrigerator to reach down to a electron temperature below 100 mK, which would be the lowest temperature ever reached by STM in this planet. Our lowest temperature measured so far is about 70 mK by the end of 2024.
Target Temperature: 9 mK or lower
UHV-compatible dilution refrigerator; 800 uW @ 100 mK cooling power (Janis)
3D Vector Magnet
9 T in Z, 2 T in 3D
Bottom-loading style
Tip/Sample exchange at RT and 20 K with Optical Access
Low Temperature and High Field
HIgh-Resolution Spectroscopy
This is a combination of STM and Q-plus AFM with a magnetic field of 12 Tesla.
USM-1500 (Unisoku Co., Ltd., Japan)
Temperature > 2 K
Magnetic field ( ~ 12 T)
Atomic Force Microscope (qPlus sensor) available
Various evaporator source attached
LEED
Cryogenic Variable (T,B) Spin-Polarized Scanning Tunneling Microscope
Technical Features
Temperature ~ 6 - 300 K (variable temperature)
Spin-polarized tip (Fe coated) preparation
Magnetic field < 9 T
Various evaporation sources attached
Scanning Tunneling Microscope/ Spectroscopy (STM/STS) with Joule-Thomson refrigerator
SPECS JT-STM
Temperature > 900 mK (JT mode)
Magnetic field < 3 T
Various evaporation sources attached
LEED
Low-Temperature Scanning Tunneling Microscopy
UNISOKU
Temperature ~ 4 K
Various evaporation sources attached
Low-temperature cleaving stage
LEED
Variable-Temperature Scanning Tunneling Microscope
Temperature > 16 K
Atomic Force Microscope (qPlus sensor) available
Various evaporation sources attached
LEED
