Oscillating chiral currents in nanotubes: A route to nanoscale magnetic test tubes

Lambert, Colin and Bailey, S. W. D. and Cserti, J. (2008) Oscillating chiral currents in nanotubes: A route to nanoscale magnetic test tubes. Physical review B, 78 (23). -. ISSN 1098-0121

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Abstract

With a view to optimizing the design of carbon-nanotube (CNT) windmills and to maximizing the internal magnetic field generated by chiral currents, we present analytical results for the group-velocity components of an electron flux through chiral carbon nanotubes. Chiral currents are shown to exhibit a rich behavior and can even change sign and oscillate as the energy of the electrons is increased. We find that the transverse velocity and associated angular momentum of electrons are a maximum for nonmetallic CNTs with a chiral angle of 18 degrees. Such CNTs are therefore the optimal choice for CNT windmills and also generate the largest internal magnetic field for a given longitudinal current. For a longitudinal current of order 10(-4) A, this field can be of order 10(-1) T, which is sufficient to produce interesting spintronic effects and a significant contribution to the self-inductance.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57886
Deposited By:
Deposited On:
29 Aug 2012 08:14
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:06