Zener quantum dot spin filter in a carbon nanotube

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We predict and analyze a novel spin filter in semiconducting carbon nanotubes. By using local electrostatic gates, the conduction and valence bands can be modulated to form a double-barrier structure. The confined region below the valence band defines a Zener quantum dot, which exhibits resonant tunneling. The resonances split in a magnetic field to make a bipolar spin filter for applications in spintronics and quantum information processing. We model this using k*p envelope function theory and show that this is in excellent agreement with a corresponding tight-binding calculation.
8 pages latex, 5 eps figs. Accepted to J. Phys. Cond. Mat

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/100383

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0412406
 http://arxiv.org/abs/cond-mat/0412406
 J. Phys.: Condens. Matter 18 (2006) S843-S849
 doi:10.1088/0953-8984/18/21/S10

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arXiv