Services

UHV Scanning Probe Microscopes

Createc LT-STM/AFM

The LT-STM is specially designed for working at the atomic scale at a low temperature (T < 6 K) and ultra-high vacuum (base pressure ~ 10-10 mbar) to perform atomic / molecular manipulation and tunneling spectroscopy experiments. The design ensures high stability (dz ~ 1 pm) and small drift (< 2 Å / hour). Long hold time at the base temperature enables demanding experiments on measuring the spatially resolved local density of states and force landscapes. The instrument has optical access to the tip-substrate junction and in situ evaporation to the cold sample. In addition, the instrument is equipped with a preparation chamber with standard sample preparation facilities (sputtering, annealing, evaporation).

STM

  • low current imaging < 1 pA
  • spatially resolved dI/dV and dI/dZ maps
  • inelastic tunneling spectroscopy d2I/dV2

AFM

  • quartz tuning fork force sensor (QPlus configuration) for simultaneous AFM and STM on the same atomic location
  • low tip oscillation amplitudes (A < 50 pm)
  • mapping force landscapes with atomic spatial resolution

contact: Prof. Peter Liljeroth

Omicron VT SPM

The system is a self-combined collection consisting of 

  • Surface Science SSX-100 electron energy analyzer and monochromatic X-ray source for X-ray Photoelectron spectroscopy (XPS)
  • Omicron VT SPM variable temperature scanning tunneling microscope
  • SPECTALEED reverse view LEED-optics for low energy electron diffraction (LEED)
  • evaporation systems for sample preparation in vacuum

STM:

  • Low Current Imaging - < 1 pA at 5 kHz bandwidth
  • High Speed Scanning - 3 frames/second
  • Superior thermal and mechanical stability
  • Multiple tunneling spectroscopy options

This device is being operated by the Surface Science and Atomic Scale Physics research groups inside the Department of Applied Physics.

Contact Doc. Jani Sainio

Unisoku USM-1300

The Unisoku USM-1300 is designed for ultralow temperatures down to 300 mK and ultra-high vacuum (base pressure ~ 10-10 mbar) to perform STM and spin-polarized STM experiments in an external magnetic field of up to 11 T. The design ensures high stability (dz ~ 1 pm) and small drift (< 2 Å / hour). In addition, the instrument is equipped with a preparation chamber with standard sample preparation facilities (sputtering, annealing, evaporation).

STM:

  • Spatially resolved local density of states
  • Ultralow temperature T = 300 mK
  • High magnetic fields up to 11 T
  • Spin-polarized STM

contact: Prof. Peter Liljeroth

This service is provided by:

Nanomicroscopy Center

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