Transverse-field-induced effects in carbon nanotubes

Wade DeGottardi, Tzu-Chieh Wei, and Smitha Vishveshwara
Phys. Rev. B 79, 205421 – Published 21 May 2009

Abstract

We investigate the properties of conduction electrons in single-walled armchair carbon nanotubes in the presence of both transverse electric and magnetic fields. We find that these fields provide a controlled means of tuning low-energy band-structure properties such as inducing gaps in the spectrum, breaking various symmetries, and altering the Fermi velocities. We show that the fields can strongly affect electron-electron interactions yielding tunable Luttinger-liquid physics, the possibility of spin-charge-band separation, and a competition between spin-density-wave and charge-density-wave orders. For short tubes, the fields can alter boundary conditions and associated single-particle level spacings as well as quantum dot behavior.

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  • Received 29 December 2008

DOI:https://doi.org/10.1103/PhysRevB.79.205421

©2009 American Physical Society

Authors & Affiliations

Wade DeGottardi1, Tzu-Chieh Wei2, and Smitha Vishveshwara1

  • 1Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080, USA
  • 2Department of Physics and Astronomy and Institute for Quantum Computing, University of Waterloo, 200 University Avenue West, Ontario, Canada N2L 3G1

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Vol. 79, Iss. 20 — 15 May 2009

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