Advertisement

Journal of Computational Electronics

, Volume 7, Issue 3, pp 280–283 | Cite as

Sharpened Aharanov-Bohm oscillations near resonance in a balanced ring with double quantum dots

  • Eric R. HedinEmail author
  • Yong S. Joe
  • Arkady M. Satanin
Article

Abstract

In a balanced Aharonov-Bohm ring with an identical quantum dot (QD) in each arm, the transmission amplitude near resonance consists of a zero and pole which can be made to nearly or exactly overlap in the complex-energy plane. This presents a sensitively balanced region of parameter space in which arbitrarily sharp transmission resonance spikes manifest. Analytical results based on a tight-binding solution of the Schrödinger Equation for this system demonstrate the extreme flux sensitivity of the balanced ring in the vicinity of the resonance near the quasi-bound state energy of the QD’s. This effect may have practical applications as a sensitive monitor of magnetic flux.

Keywords

Aharanov-Bohm rings Quantum dots Resonances 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Holleitner, W., Decker, C.R., Qin, H., Ebert, K., Blick, R.H.: Phys. Rev. Lett. 87, 256802 (2001) CrossRefGoogle Scholar
  2. 2.
    Chen, J.C., Chang, A.M., Melloch, M.R.: Phys. Rev. Lett. 92, 176801 (2004) CrossRefGoogle Scholar
  3. 3.
    Ladron de Guevara, M.L., Claro, F., Orellana, P.A.: Phys. Rev. B 67, 195335 (2003) CrossRefGoogle Scholar
  4. 4.
    Kang, K., Cho, S.Y.: J. Phys.: Condens. Matter 16, 117 (2004) CrossRefGoogle Scholar
  5. 5.
    Hod, O., Baer, R., Rabani, E.: J. Phys. Chem. B 108, 14807 (2004) CrossRefGoogle Scholar
  6. 6.
    Kubala, B., König, J.: Phys. Rev. B 65, 245301 (2002) CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media LLC 2008

Authors and Affiliations

  • Eric R. Hedin
    • 1
    Email author
  • Yong S. Joe
    • 1
  • Arkady M. Satanin
    • 2
  1. 1.Center for Computational Nanoscience, Department of Physics and AstronomyBall State UniversityMuncieUSA
  2. 2.Institute for Physics of Microstructures, RASNizhny NovgorodRussia

Personalised recommendations