Contact-induced spin polarization in carbon nanotubes

Abstract

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.

arXiv commentTo appear in Phys. Rev. B (2003)

References in corpus (2)

• Ferromagnetism of a graphite nodule from the Canyon Diablo meteorite
• Electromechanical Effects in Carbon Nanotubes

Cited by in corpus (5)

• Indirect exchange coupling between magnetic adatoms in carbon nanotubes
• Spin-dependent electronic structure of transition-metal atomic chains adsorbed on single-wall carbon nanotubes
• Graphene-based spin-pumping transistor
• Non-collinear coupling between magnetic adatoms in carbon nanotubes
• Graphene as a non-magnetic spin-current lens