Physics – Condensed Matter
Scientific paper
1995-05-23
Physics
Condensed Matter
4 pages in Revtex
Scientific paper
The localization properties of a two-dimensional disordered electron gas in a strong external magnetic field are studied. The impurities are considered to be located on a square lattice with random amplitudes. The concentration of these impurities is low, i.e., the average distance between the impurities exceeds the magnetic length. For short-ranged impurity potentials we analytically obtain an exponent $\nu=2/3$ for the divergence of the localization length at the lowest Landau level. The density of states is also calculated.
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