Aharonov-Bohm Effect in Concentric Quantum Double Rings

POSTER

Abstract

We propose a theoretical model to study the single-electron spectra of the concentric quantum double ring fabricated lately by self-assembled technique. Exact diagonalization method is employed to examine the Aharonov-Bohm effect in the concentric double ring. It is found the appearance of the AB oscillation in total energy depends on the strength of the screened potential. Variations of the energy spectra with the presence of coulomb impurities located at inner or outer ring are also investigated.

*This work is supported partially by the National Science Council, Taiwan under the grant number NSC 95-2119-M-009

Authors

  • Guang-Yin Chen

    • Institute of Physics, National Chiao-Tung University, Hsinchu 300, Taiwan

  • Yueh-Nan Chen

    • Department of Physics, National Cheng Kung University, Tainan 701, Taiwan

  • Der-San Chuu

    • Department of Electrophysics, National Chiao-Tung University, Hsinchu 300, Taiwan