Generalized Hund's rule in the addition spectrum of a quantum dot
Institut für Theoretische Physik,
Universität Regensburg D-93040 Regensburg, Germany
Accepted: 17 April 1998
We report on ground-state calculations based on current-spin density-functional theory for circular parabolic quantum dots. Hund's first rule, well-known from atomic physics, applies not only at zero magnetic field; analogous rules, related to the level occupancy near the Fermi energy, determine the spin configuration of the ground state in finite magnetic field. Consequently, the addition spectrum of the quantum dot exhibits a specific non-monotonous dependence on magnetic field. We discuss our results with focus on recent experiments which may already contain indications of this new feature.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 71.15.Mb – Density functional theory, local density approximation / 73.23.-b – Mesoscopic systems
© EDP Sciences, 1998