2009/09/25 by L. K. Castelano, G. -Q. Hai, G.-Q. Hai +2
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Magnetism in coordination complexes #Organic and Molecular Conductors Research #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.3223360
published as J. Appl. Phys. 106, 073702 (2009) · accepted for publication in Journal of Applied Physics (in press)
arxiv created 2009/09/25 · openalex publication_date 2009/10/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The ground states of a few electrons confined in two vertically coupled quantum rings in the presence of an external magnetic field are studied systematically within the current spin-density functional theory. Electron-electron interactions combined with inter-ring tunneling affect the electronic structure and the persistent current. For small values of the external magnetic field, we recover the zero magnetic field molecular quantum ring ground state configurations. Increasing the magnetic field many angular momentum, spin, and isospin transitions are predicted to occur in the ground state. We show that these transitions follow certain rules, which are governed by the parity of the number of electrons, the single-particle picture, Hund’s rules, and many-body effects.