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Effects of Magnetic Quantum Dots on Magnetoconductance in Quantum Wires

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Abstract

We present a theoretical study of electronic transport in quantum wires (narrow two-dimensional electron gas) with array of magnetic quantum dots. Each magnetic quantum dot is defined by a small circular region where the strength of perpendicular magnetic field is modulated. By making use of a newly developed calculation method based on the gauge transformations, we calculated the conductance as a function of the external perpendicular magnetic field. Our numerical calculations show that the magnetoconductance is very sensitive to the number of magnetic quantum dots in the field region where the direction of the net magnetic field in dot regions is antiparallel to the external magnetic field.

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Authors and Affiliations

  1. Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul, 100-715, Korea

    S. Souma, S. J. Lee, N. Kim & T. W. Kang

  2. Department of Physics, Chungnum National University, Taejon, 305-764, Korea

    G. Ihm

  3. Department of Physics, Pusan National University, Pusan, 609-735, Korea

    K. S. Yi

  4. Department of Physics, Faculty of Science, Science University of Tokyo, Tokyo, 162-8601, Japan

    A. Suzuki

Authors
  1. S. Souma
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  2. S. J. Lee
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  3. N. Kim
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  4. T. W. Kang
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  5. G. Ihm
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  6. K. S. Yi
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  7. A. Suzuki
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Souma, S., Lee, S.J., Kim, N. et al. Effects of Magnetic Quantum Dots on Magnetoconductance in Quantum Wires. Journal of Superconductivity 16, 339–342 (2003). https://doi.org/10.1023/A:1023673605507

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  • DOI: https://doi.org/10.1023/A:1023673605507

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