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Zener quantum dot spin filter in a carbon nanotube.

Gunlyke, D. and Jefferson, J. H. and Bailey, S. W. D. and Lambert, C. J. and Pettifor, G. and Briggs, G. A. D. (2006) Zener quantum dot spin filter in a carbon nanotube. Journal of Physics: Condensed Matter, 18 (21). S843-S849. ISSN 1361-648X

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Abstract

We predict and analyse 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 tunnelling. 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 envelope function theory and show that this is in excellent agreement with a corresponding tight-binding calculation.

Item Type: Article
Journal or Publication Title: Journal of Physics: Condensed Matter
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 555
Deposited By: Prof Colin J. Lambert
Deposited On: 20 Jun 2007
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 22:08
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/555

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