Density of states in a magnetic field and electron–electron interactions

We present magnetoconductivity measurements of two-dimensional non-degenerate electrons on liquid helium at View the MathML source. We measured the magnetoconductivity from an extremely low density where e–e interactions are negligible to densities where Coulomb interactions dominate the width of the density of states peaks. We observe a crossover from Drude theory to SCBA as a function of both magnetic field and electron density at finite classical fields.