Aarhus Universitets segl

Yong P. Chen group

The group exploits various quantum materials (topological insulators, superconductors, ferromagnetic and antiferromagnetic materials etc.) and their heterostructures for manipulation of quantum states of electrons, spins and photons with the aim to uncover novel quantum phenomena applicable for quantum information processing and quantum computation. To pursue the goal the following research facilities are availaible in the group:

Scanning Tunnelling Microscopy (STM) lab

Unisoku USM1300/16T STM

The STM system can be operated down to 300 mK and up to a magnetic field of 16 T applied perpendicular to sample surface. The ultra-low temperature, together with the atomic-resolution microscopy and spectroscopy provides an excellent platform for studies of electronic properties of 2D materials and interfaces. The system at present permiis for cleaving various 3D crystals, in-situ exfoliation of layred systems as well as deposition of

  • metals (Pb, Nb, Co, Fe etc)
  • atomic H 
  • molecular gases (O2, H2 etc)

Device fabrication and characterisation lab

System of interconnected gloveboxes:

Our group has set up three interconnected glovebox systems (Jacomex) capable of holding inert (N2) atmosphere in either overpressure or underpressure conditions with an autonomous purification unit continuously maintaining <1 ppm O2 and H2O under normal operating conditions. The individual gloveboxes are designated and configured for

  • micromechanical exfoliation and transfer/stacking of 2D layered materials,
  • Fourier Transform Infrared (FTIR) spectroscopy and Raman and Photoluminescence (PL) spectroscopy 
  • Atomic Force Microscopy (AFM) and related techniques.

Closed cycle transport/SPM/Raman system

Parameters of the system are the following:

  • 12 T superconducting magnet
  • Operating temperatures 1.5 K to 400 K
  • Option of 6 different inserts:
  • 20 contacts DC insert with Cu wiring
  • 20 contacts 360 deg. sample rotator 
  • 10 contacts AC low frequency coaxial cables + 2 contacts for high frequency semi-rigid coaxial cables
  • STM/SHPM/AFM insert
  • Confocal Raman insert 
  • NV centre magnetometry insert (to be delivered)