The HiTIMe project has a number of scientific objectives:

  • High-quality topological insulator nanoribbons (TINR) are synthesized and characterised at the nanoscale using methods such as scanning probe microscopy, microwave microscopy, THz scattering scanning near-field microscopy (s-SNOM) and local transport measurements.
  • The results are fed back to material synthesis to tailor the properties of TINR, including new methods for controlled doping (e.g. charge and magnetic doping).
  • The third pillar is the advancement of current state-of-the art bottom up device fabrication techniques on TINRs, specifically for creating charge confinement and high frequencies gates.
  • All these efforts are guided by theoretical materials- and device modelling.

The above steps will help us to meet the following main objectives of the project, which together will lead to our targeted breakthrough: the demonstration of RF manipulation and readout of single charge states in TIs.  The work are organized into three scientific workpackages.

  • Synthesis of new high quality TINR materials. (WP1)
  • Methodology for characterising pristine TINRs using microwave and THZ Scanning Probe Microscopy (SPM) techniques. (WP2)
  • Development of efficient RF gating technology for TI states. (WP2/3)
  • Isolation of single charges on surfaces of TINRs. (WP2/3)
  • Development of a TI high frequency single electron transistor, RF-SET (WP3)