Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2012-04-13
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 12 figures
Scientific paper
We present a theoretical study of the spectrum of electrons confined in triple concentric rings. An unusual ordering and rich variety of angular momentum transitions are found that depend on the coupling between the rings and the confinement potential of the rings. Using the Configuration Interaction (CI) method, we calculated the two electron energy spectrum. Spin singlet to spin triplet transitions of the electron ground state are predicted and a fractional Aharonov-Bohm effect is found. We show that both the period and amplitude of the spin singlet - triplet energy gap depend strongly on the confinement potential and the external magnetic field. The spin singlet - triplet transition is found to depend on the spin Zeeman energy, especially for rings with weak confinement and in the presence of large magnetic field. The amplitude of the spin singlet - triplet energy gap depends on the Land\'{e} $g$-factor but the period of the transitions is independent of $g$.
Li Bin
Peeters François M.
No associations
LandOfFree
Controllable spin singlet - spin triplet transition in three concentric quantum rings through magnetic field and confinement potential does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Controllable spin singlet - spin triplet transition in three concentric quantum rings through magnetic field and confinement potential, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controllable spin singlet - spin triplet transition in three concentric quantum rings through magnetic field and confinement potential will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-33194