Robust nodal structure of Landau level wave functions revealed by Fourier transform scanning tunneling spectroscopy.

Scanning tunneling spectroscopy is used to study the real-space local density of states of a two-dimensional electron system in a magnetic field, in particular within higher Landau levels. By Fourier transforming the local density of states, we find a set of n radial minima at fixed momenta for the nth Landau levels. The momenta of the minima depend only on the inverse magnetic length.

Quantum Hall transition in real space: from localized to extended states.

Using scanning tunneling spectroscopy in an ultrahigh vacuum at low temperature (T=0.3 K) and high magnetic fields (B View Article and Find Full Text PDF