Semiconductors

  STS image of the local density of states at 14 T of a semiconductor Copyright: © Markus Morgenstern Scanning tunneliing spectroscpy image (STS) of the local density of states (LDOS) at 14 T exhibiting the extended state at the Landau level center.

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)
  Hartree calculation of the LDOS at the Landau level center Copyright: © Markus Morgenstern Hartree calculation of the local density of states (LDOS) with extended state at the Landau level center.