The orbital magnetization of single and double quantum dots in a tight binding model

Details The orbital magnetization of single and double quantum dots in a tight binding model The orbital magnetization of single and double quantum dots in a tight binding model

2002-07-11

arxiv.org/abs/cond-mat/0207307v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages and 10 figures, to appear in PRB

Scientific paper

10.1103/PhysRevB.67.035324

We calculate the orbital magnetization of single and double quantum dots coupled both by Coulomb interaction and by electron tunneling. The electronic states of the quantum dots are calculated in a tight-binding model and the magnetization is discussed in relation to the energy spectrum and to the edge and bulk states. We identify effects of chirality of the electronic orbits and of the anti-crossing of the energy levels when the magnetic field is varied. We also consider the effects of detuning the energy spectra of the quantum dots by an external gate potential. We compare our results with the recent experiments of Oosterkamp et al., Phys. Rev. Lett. 80, 4951 (1998).

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