STABILITY OF REGULAR ORBITS IN BALLISTIC QUANTUM DOTS

We study theoretically and experimentally a nominally stadium shaped q uantum billiard, a device in which the classical dynamics is expected to be chaotic. Using self-consistent solutions for the confining poten tial in our calculations, we find, in agreement with experiment, that the magnetotransport is dominated by a periodic oscillations, characte ristic of regular orbits in the structure, indicating the stability of non-chaotic classical trajectories. (C) 1998 Elsevier Science B.V. Al l rights reserved.