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Pseudo-spin filter in metallic single-walled carbon nanotubes

 
: Bercioux, D.; Mayrhofer, L.

:

Institute of Electrical and Electronics Engineers -IEEE-; Institute of Electrical and Electronics Engineers -IEEE-, Nanotechnology Council:
7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2012 : Kyoto, Japan, 5 - 8 March 2012
New York, NY: IEEE, 2012
ISBN: 978-1-4673-1122-9
ISBN: 978-1-4673-1124-3
pp.294-297
International Conference on Nano/Micro Engineered and Molecular Systems (NEMS) <7, 2012, Kyoto>
English
Conference Paper
Fraunhofer IWM ()
bonds (chemical); carbon nanotubes; crystal symmentry; electron backscattering; vacanies crystal; CNT; pseudo-spin; defects; graphene

Abstract
We analyze the scattering properties of low-energy electrons in metallic single-walled carbon nanotubes in the presence of structural defects. In particular, we focus on vacancy defects characterized by the lack of two carbon atoms. We show how the geometry of the defect with respect to the tube symmetry establishes the available scattering channels. Furthermore, we show how the reconstruction of the chemical bond among the carbon atoms at the place of the defect can induce a selection rule based on the pseudo-spin of the scattered electrons. This selection rule results in an effective filtering of the scattered electrons with respect to the pseudo-spin.

: http://publica.fraunhofer.de/documents/N-206414.html