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Electronic Contribution to the energetics of helically-wrapped nanotubes
(2006)
Motivated by evidence of helical wrapping of polymeric molecules around nanotubes, we calculate the
electronic contribution to the energetics of linear charge distributions around a nanoscale cylindrical structure.
This ...
Inadequacy of the asymptotic approximation for the interlayer coupling in Fe/Ag/Fe and Fe/Au/Fe (001) trilayers
(American Physical Society, 1999)
We discuss the basic assumptions underlying the stationary phase approximation to the interlayer exchange coupling between magnetic materials across nonmagnetic spacers. We show that, for temperatures and spacer thicknesses ...
Quantum ratchets with few bands below the barrier
(American Physical Society, 2002)
We investigate directed motion in nonadiabatically rocked ratchet systems sustaining few bands below the barrier. Upon restricting the dynamics to the lowest M bands, the total system-plus-bath Hamiltonian is mapped onto ...
Exchange coupling between iron layers separated by bcc. copper
(American Physical Society, 1997)
The exchange coupling between Fe layers separated by bcc Cu is calculated for Fe/Cu/Fe (001) trilayers. It is shown that the coupling is basically regulated by three extrema of the bulk bcc Cu Fermi surface. The contributions ...
Exponential behavior of the interlayer exchange coupling across nonmagnetic metallic superlattices
(1998)
It is shown that the coupling between magnetic layers separated by nonmagnetic metallic superlattices can decay exponentially as a function of the spacer thickness N, as opposed to the usual N-2 decay. This effect is due ...
The relationship between network morphology and conductivity in nanotube films
(2008)
We have characterized both the direct current conductivity and morphology of a wide range of films made from bundled nanotubes, produced by a selection of commercial suppliers. The conductivity increases with increasing ...
Indirect exchange coupling between magnetic adatoms in carbon nanotubes
(2005)
The long-range character of the exchange coupling between localized magnetic moments indirectly mediated by the conduction electrons of metallic hosts can play a significant role in determining the magnetic order of ...
Enhanced magnetoresistance effect in layered systems
(1999)
Magnetoresistance ratios several orders of magnitude higher than those of conventional multilayers
may be obtained with much smaller saturation fields in magnetic layers separated by a periodically
modulated structure. ...
Contact-induced spin polarization in carbon nanotubes
(2004)
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 ...
Carbon nanotube: a low-loss spin-current waveguide
(2010)
We demonstrate with a quantum-mechanical approach that carbon nanotubes are excellent spin-current waveguides and are able to carry information stored in a precessing magnetic moment for long distances with very little ...