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

Journal Article · Wed Jan 14 00:00:00 EST 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4905678· OSTI ID:22412829

Maiti, Santanu K., E-mail: [e-mail] ^[1]

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1. Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 Barrackpore Trunk Road, Kolkata-700 108 (India)

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.

• OSTI ID: 22412829
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CONTROL
ELECTRIC FIELDS
ELECTRIC POTENTIAL
MAGNETIC FIELDS
QUANTUM SYSTEMS
QUANTUM WIRES
RINGS
SPIN