Resonant Raman scattering of the smallest single-walled carbon nanotubes
|Authors||Tang, Z. K.
Zhai, J. P.
Tong, Y. Y.
Hu, X. J.
Feng, Y. J.
|Source||Physical review letters, v. 101, (4), 2008, JUL 25, article number 047402|
|Summary||We report optical properties of the smallest single-walled carbon nanotubes (SWNTs) with a diameter of only 3 A. These ultrasmall SWNTs are fabricated in the elliptical nanochannels of an AlPO-11 (AEL) single crystal. Polarized and resonant Raman scattering unambiguously revealed that these 0.3 nm SWNTs are of (2,2) armchair symmetry. Interestingly, the (2,2) armchair tube has two metastable ground states corresponding to two slightly different lattice constants in the axial direction: one state is metallic and the other is semiconducting.|
|Rights||Physical Review Letters © copyright 2008 American Physical Society. The journal's web site is located at http://prl.aps.org|
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