Magnetization of interacting confined two-dimensional electron systems.

Gabriel Vasile
Science Institute, University of Iceland, IS-107 Reykjavik, Iceland

In order to understand the orbital and spin magnetization of a a confined electronic system we analyze these ground state properties in the transition from a quantum dot to a quantum ring of finite thickness. The Coulomb interaction between the electrons is treated in the Hartree and Hartree-Fock approximations and special care is taken to include also the contributions of the nonlocal current to the summation of the magnetic moments of the occupied states. We identify changes in the many-body structure of the ground state and in the magnetization curves versus the magnetic field and other parameters characterizing the system.