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