Installed in 2023, the Unisoku USM 1600 STM realizes the lowest base temperature and high magnetic field for STM. It has a Cryogenic dilution refrigeration cryostat operating at 40 mK with superconductor vector magnet, controlled by Nanonis™ SPM control system. It is a high-end performance STM for detection and manipulation of electronic and magnetic states and low-energy excitations, fundamental to study superconductivity and low temperature physics with atomic fidelity.
FEATRUES:
• Structural and spectral mapping in atomic resolution
• Spin-polarized STM
• Quasiparticle interference (QPI) STM
• Inelastic tunneling spectroscopy (IETS)
• Base temperature: < 40 mK
• Liquid helium holding time up to 7 days
• Ultra-high vacuum: < 10-10 Torr
• Vector magnetic field (2-2-9 T in XYZ direction)
• Sample transfer in vacuum by using UHV suitcase
• Sample annealing (< 1500 K), sputtering (Ne ion)
• Tip cleaning with electron bombardment heating
• MBE deposition with thermal/ e-beam evaporator.
• Low temperature cleaving (80 K)
