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      Orbital magnetization of single and double quantum dots in a tight-binding model

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      Author(s)
      Aldea, A.
      Moldoveanu, V.
      Niţǎ, M.
      Manolescu, A.
      Gudmundsson, V.
      Tanatar, Bilal
      Date
      2003
      Source Title
      Physical Review B - Condensed Matter and Materials Physics
      Print ISSN
      0163-1829
      Publisher
      American Physical Society
      Volume
      67
      Issue
      3
      Pages
      1 - 22
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      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 anticrossing 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)].
      Keywords
      Analytic method
      Circular dichroism
      Image enhancement
      Magnetism
      Model
      Molecular interaction
      Oscillation
      Quantum mechanics
      Simulation
      Solvation
      Permalink
      http://hdl.handle.net/11693/24535
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