Low Temperature Scanning Probe Microscopy

A notable feature of scanning probe microscopy (SPM) is its amenability to instrumental developments that constantly add new application areas to its domain. Amidst this progress, we drive SPM toward becoming a multipurpose tool for the precise manipulation of nanoscale quantum bits on surfaces.

Group leader: Prof. Dr. Ruslan Temirov

Members:
Dr. Taner Esat
Dr. Stefan Korte
Xiaosheng Yang, M.Sc.

Prof. Dr. Ruslan Temirov

STM at milliKelvin temperatures with magnetic cooling

Millikelvin STM with magnetic cooling

We have recently developed an ultra-high vacuum scanning tunnelling microscope that reaches a base temperature of 0.03 Kelvin. It employs adiabatic demagnetisation refrigeration (ADR).

Controlled manipulation of large molecules

Fabrication of atomic-scale quantum structures

Using SPM for controlled single-molecule and atom manipulation, we search for new ways of fabricating surface structures whose quantum properties can be exploited for fundamental studies of quantum entanglement, possibly leading to future applications in quantum technology.

Scanning Quantum Dot Microscopy (SQDM)

Scanning Quantum Dot Microscopy (SQDM)

Our single-molecule manipulation experiments have led us to the discovery of a new scanning probe technique that is able to image nanoscale variations of the electrostatic potential of surfaces with very high sensitivity and spatial resolution.

High-resolution STM imaging of molecular structures with functionalized tips

High-resolution SPM with functionalised tips

We have been the first to resolve the inner structure of a large organic molecule with scanning probe microscopy, providing images that resemble structure formulae of chemistry textbooks. To this end, we used STM tips that were functionalised with molecular hydrogen.