MAGNETIC EDGE STATES IN A MAGNETIC QUANTUM-DOT

The formation of magnetic edge states along with corresponding classic al trajectories is investigated for a magnetic quantum dot with inhomo geneous distributions of magnetic fields. The magnetic edge states are found to circulate either clockwise or counterclockwise along the bou ndary region of the quantum dot, depending on the number of missing fl ux quanta, and exhibit quite different properties, as compared to the conventional ones which are induced by electrostatic confinements in t he quantum Hall system. [S0031-9007(98)05359-9].