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arXiv · 1407.4926

Externally controlled local magnetic field in a conducting mesoscopic ring coupled to a quantum wire

Santanu K. Maiti
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Abstract

In the present work the possibility of regulating local magnetic field in a quantum ring is investigated theoretically. The ring is coupled to a quantum wire and subjected to an in-plane electric field. Under a finite bias voltage across the wire a net circulating current is established in the ring which produces a strong magnetic field at its centre. This magnetic field can be tuned externally in a wide range by regulating the in-plane electric field, and thus, our present system can be utilized to control magnetic field at a specific region. The feasibility of this quantum system in designing spin-based quantum devices is also analyzed.

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Santanu K. Maiti. 2015-01-28. Externally controlled local magnetic field in a conducting mesoscopic ring coupled to a quantum wire. https://doi.org/10.1063/1.4905678

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