Electronic Properties of a Concentric Triple Quantum Nanoring

Salehani, H. K.; Esmaeilzadeh, M.; Shakouri, Kh.; Abolhassani, M. R.; Faizabadi, E.; Majlesara, M. H.

Electronic Properties of a Concentric Triple Quantum Nanoring

Authors

H. K. Salehani ¹

M. Esmaeilzadeh ²

Kh. Shakouri ²

M. R. Abolhassani ¹

E. Faizabadi ²

M. H. Majlesara ³

¹ Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, I.R. Iran

² Department of Physics, Iran University of Science and Technology, Tehran, I.R. Iran

³ Department of Physics, Faculty of Science, Tarbiat Moallem University, Tehran, I.R. Iran

Abstract

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.

Keywords

Quantum rings

Electronic properties

Energy spectra

Magnetic flux