Optical signatures of the Aharonov-Bohm phase in single-walled carbon nanotubes |
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Authors: | Zaric Sasa Ostojic Gordana N Kono Junichiro Shaver Jonah Moore Valerie C Strano Michael S Hauge Robert H Smalley Richard E Wei Xing |
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Institution: | Department of Physics and Astronomy, Rice University, Houston, TX 77005 USA. |
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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. |
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