Orbital magnetic properties of quantum dots: the role of electronelectron interactions
Abstract
We study the magnetic orbital response of a system of N interacting electrons confined in a twodimensional geometry and subjected to a perpendicular magnetic field in the finite temperature HartreeFock approximation. The electronelectron interaction is modelled by a shortrange Yukawatype potential. We calculate the ground state energy, magnetization, and magnetic susceptibility as a function of the temperature, the potential range, and the magnetic field. We show that the amplitude and period of oscillations in the magnetic susceptibility are strongly affected by the electronelectron interaction as evidenced in experimental results. The zerofield susceptibility displays both paramagnetic and diamagnetic phases as a function of temperature and the number of confined electrons.
 Publication:

APS Ohio Sections Fall Meeting Abstracts
 Pub Date:
 October 2003
 Bibcode:
 2003APS..OSF.C4004D