title: Aharonov-Bohm interference and beating in single-walled carbon-nanotube interferometers.
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 Phi0 = 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.
authors.affiliation: Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
authors.forename: Jien
authors.initials: J
authors.lastname: Cao
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Marco
authors.initials: M
authors.lastname: Rolandi
authors.forename: Hongjie
authors.initials: H
authors.lastname: Dai