Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, I.R. Iran
Department of Physics, Iran University of Science and Technology, Tehran, I.R. Iran
Department of Physics, Faculty of Science, Tarbiat Moallem University, Tehran, I.R. Iran
In this paper, we study the electronic properties of a concentric triple quantum ring using exact diagonalization technique. The energy spectra and magnetization for a single electron and two electrons, in the presence of an applied magnetic field, are calculated and discussed. It is shown that, for two-interacting electrons, the period of Aharonov-Bohm oscillations decreases to the half of that for non-interacting electrons which shows the fractional Aharonov-Bohm oscillations for interacting electrons. It is found that the spin-singlet state for two electrons is more stable than the spin-triplet states. Also, magnetization effect decreases due to the electronelectron interaction.