Createc LT-STM low-temperature STM / AFM (to be installed in March 2012)
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 ~ 1pm) 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/dV^2
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