Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Zener quantum dot spin filter in a carbon nanotube
AU - Gunlyke, D.
AU - Jefferson, J. H.
AU - Bailey, S. W. D.
AU - Lambert, C. J.
AU - Pettifor, G.
AU - Briggs, G. A. D.
PY - 2006/5/31
Y1 - 2006/5/31
N2 - 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 (k) over right arrow . (p) over right arrow envelope function theory and show that this is in excellent agreement with a corresponding tight-binding calculation.
AB - 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 (k) over right arrow . (p) over right arrow envelope function theory and show that this is in excellent agreement with a corresponding tight-binding calculation.
U2 - 10.1088/0953-8984/18/21/S10
DO - 10.1088/0953-8984/18/21/S10
M3 - Journal article
VL - 18
SP - S843-S849
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 1361-648X
IS - 21
ER -