Contact-induced spin polarization in carbon nanotubes
COEY, JOHN MICHAEL DAVID
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Citation:Ferreira, Mauro S. and Sanvito, Stefano ???Contact-induced spin polarization in carbon nanotubes?? in Physical Review B, 69, (3), 2004, pp 035407-1 ??? 035407-6
Motivated by the possibility of combining spintronics with molecular structures, we investigate the conditions for the appearance of spin polarization in low-dimensional tubular systems by contacting them to a magnetic substrate. We derive a set of general expressions describing the charge transfer between the tube and the substrate and the relative energy costs. The mean-field solution of the general expressions provides an insightful formula for the induced spin polarization. Using a tight-binding model for the electronic structure we are able to estimate the magnitude and the stability of the induced moment. This indicates that a significant magnetic moment in carbon nanotubes can be observed.
Publisher:American Physical Society
Series/Report no:Physical Review B