title: Optical signatures of the Aharonov-Bohm phase in single-walled carbon nanotubes.
abstract: We report interband magneto-optical spectra for single-walled carbon nanotubes in high magnetic fields up to 45 tesla, confirming theoretical predictions that the band structure of a single-walled carbon nanotube is dependent on the magnetic flux phi threading the tube. We have observed field-induced optical anisotropy as well as red shifts and splittings of absorption and photoluminescence peaks. The amounts of shifts and splittings depend on the value of phi/phi(0) and are quantitatively consistent with theories based on the Aharonov-Bohm effect. These results represent evidence of the influence of the Aharonov-Bohm phase on the band gap of a solid.
authors.affiliation: Department of Physics and Astronomy, Rice University, Houston, TX 77005 USA.
authors.forename: Sasa
authors.initials: S
authors.lastname: Zaric
authors.forename: Gordana N
authors.initials: GN
authors.lastname: Ostojic
authors.forename: Junichiro
authors.initials: J
authors.lastname: Kono
authors.forename: Jonah
authors.initials: J
authors.lastname: Shaver
authors.forename: Valerie C
authors.initials: VC
authors.lastname: Moore
authors.forename: Michael S
authors.initials: MS
authors.lastname: Strano
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hauge
authors.forename: Richard E
authors.initials: RE
authors.lastname: Smalley
authors.forename: Xing
authors.initials: X
authors.lastname: Wei