Semiconductors

Low-Dimensional III-V semiconductors are investigated by scanning tunneling spectroscopy, photolectron spectroscopy and transport measurements. In particular, two dimensional systems in magnetic field are probed as prototypes of tunable quantum phase transitions.

Central goal is the determination of fingerprints of the different electron phases and its transitions in real space.

Methods

  • Angle-resolved photoemission spectroscopy (ARPES)
  • Scanning tunneling microscopy (STM) and spectroscopy (STS)

Recent Projects

Please click on the headlines to get more information.

k-Space Mapping of Two-Dimensional Electron Systems in Semiconductors (ARPES)
Landau Level Spectroscopy (STS)
Real Space Mapping of Quantum Hall Transitions (STS)
Nodal Structures of Landau Level Wave Functions (STS)
Probing the Local Rashba Parameter (STS)
Probing Electron-Electron Interaction (STS)
Scanning tunneliing spectroscpy image (STS) of the local density of states (LDOS) at 14 T exhibiting the extended state at the Landau level center.

Scanning tunneliing spectroscpy image (STS) of the local density of states (LDOS) at 14 T exhibiting the extended state at the Landau level center.

Hartree calculation of the local density of states (LDOS) with extended state at the Landau level center.

Hartree calculation of the local density of states (LDOS) with extended state at the Landau level center.