NONLOCAL EFFECTS IN A 2-DIMENSIONAL ELECTRON-GAS WITH A PERIODIC LATTICE OF SCATTERERS

The nonlocal resistance of a two-dimensional electron gas in a periodi c lattice of antidots is investigated. Anomalous growth of this resist ance is observed when 2R(c) approximate to d (R(c) is the Larmor radiu s). This growth is caused by the appearance of runaway trajectories, s kipping along the antidots and running away along the rows of antidots . It is shown on the basis of a comparative analysis of the local and nonlocal magnetoresistance that the character of the electronic billia rd trajectories corresponds to the characteristic features of magnetot ransport. (C) 1996 American Institute of Physics.