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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2003.02.24-28

Charge transfer through a quantum-dot-interferometer

J. Yi

Current Issues of Nano-Bio-Science

2003.02.24-28; Mauterndorf, Austria

We examine the charge transfer through quantum dots arranged to form a triangular geometry the center of which is pierced by a localized magnetic flux. Here, quantum dots are coupled each other via junctions through which electrons can tunnel from one dot to the other, manifesting interference effect according to the flux. It is found that the conductance depends on the spin configuration of the dots due to a two-particle (destructive) interference between spin-up electrons which does not occur between spin-up and spin-down electron. Further, the periodicity of the conductance oscillation depends on the electron occupation in the dots, which is discussed with basis on the large gauge transformation.

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