Probing the Shape of Quantum Dots with Magnetic Fields
arXiv:cond-mat/0402362 · doi:10.1103/PhysRevB.69.155312
Abstract
A tool for the identification of the shape of quantum dots is developed. By preparing a two-electron quantum dot, the response of the low-lying excited states to a homogeneous magnetic field, i.e. their spin and parity oscillations, is studied for a large variety of dot shapes. For any geometric configuration of the confinement we encounter characteristic spin singlet - triplet crossovers. The magnetization is shown to be a complementary tool for probing the shape of the dot.
11 pages, 4 figures