Aharonov-Bohm Interference and Beating in Single-Walled Carbon-Nanotube Interferometers

Phys. Rev. Lett. 93, 216803 – Published 17 November 2004
Jien Cao, Qian Wang, Marco Rolandi, and Hongjie Dai

Abstract

Relatively low magnetic fields applied parallel to the axis of a chiral single-walled carbon nanotube are found causing large modulations to the p channel or valence band conductance of the nanotube in the Fabry-Perot interference regime. Beating in the Aharonov-Bohm type of interference between two field-induced nondegenerate subbands of spiraling electrons is responsible for the observed modulation with a pseudoperiod much smaller than that needed to reach the flux quantum Φ0=h/e through the nanotube cross section. We show that single-walled nanotubes represent the smallest cylinders exhibiting the Aharonov-Bohm effect with rich interference and beating phenomena arising from well-defined molecular orbitals reflective of the nanotube chirality.

DOI: http://dx.doi.org/10.1103/PhysRevLett.93.216803

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  • Received 3 June 2004
  • Published 17 November 2004

© 2004 The American Physical Society

Authors & Affiliations

Jien Cao, Qian Wang, Marco Rolandi, and Hongjie Dai*

  • Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA

  • *Email: hdai@stanford.edu

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