Electron dynamics in a coupled quantum-point contact structure with a local magnetic moment

We develop a theoretical model for the description of electron dynamics in coupled quantum wires when the local magnetic moment is formed in one of the wires. We employ a single-particle Hamiltonian that takes account of the specific geometry of potentials defining the structure as well as electron...

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Bibliographic Details
Published in:IEEE transactions on nanotechnology 2005-01, Vol.4 (1), p.21-26
Main Authors: Puller, V.I., Mourokh, L.G., Shailos, A., Bird, J.P.
Format: Article
Language:English
Subjects:
Birds
Contact
Couplings
Detectors
Dynamics
Electron scattering
Electrons
Geometry
Magnetic moment
Magnetic moments
Magnetic resonance
Mathematical analysis
Mathematical models
Particle measurements
Physics
Quantum wires
semiconductor devices
Solid state circuits
tunneling
Wire
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Summary:We develop a theoretical model for the description of electron dynamics in coupled quantum wires when the local magnetic moment is formed in one of the wires. We employ a single-particle Hamiltonian that takes account of the specific geometry of potentials defining the structure as well as electron scattering on the local magnetic moment. The equations for the wave functions in both wires are derived and the approach for their solution is discussed. We determine the transmission coefficient and conductance of the wire having the local magnetic moment and show that our description reproduces the experimentally observed features.
ISSN:1536-125X
1941-0085
DOI:10.1109/TNANO.2004.840146