Stahl, E. and Weiss, Dieter and Weinmann, G. and Klitzing, Klaus von and Ploog, K.
Density of states in a two-dimensional electron gas in a strong magnetic field.
Journal of Physics (London) C, Solid State Physics : J. Phys. C 18, L 783-L 787.
Other URL: http://www.iop.org/EJ/toc/0022-3719/18/26, http://www.iop.org/EJ/journal/JPhysC/1
The authors have measured the density of states in the tails of the Landau levels of GaAs-AlxGa1-xAs heterostructures by analysing the variation of the Fermi level position as a function of the magnetic field. The experimental data are best described by a gaussian-like density of states superimposed on a constant background density of states.