Commensurability oscillations due to pinned and drifting orbits in a two-dimensional lateral surface superlattice

David E. Grant, Andrew R. Long, John H. Davies

We have simulated conduction in a two-dimensional electron gas subject to a weak two-dimensional periodic potential, $V_x\cos (2\pi x/a)+V_y\cos (2\pi y/a)$. The usual commensurability…