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 1361-648XFull text not available from this repository.
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.
|Journal or Publication Title:||Journal of Physics: Condensed Matter|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited By:||Prof Colin J. Lambert|
|Deposited On:||20 Jun 2007|
|Last Modified:||09 Apr 2014 22:08|
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