2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26929The Kekule patterns are realized in the metallic tubules and chain-like distortions occur in the semiconducting tubules.Revised manuscript submitted to Phys. Rev. B; 12 pages and 12 figures. Please request figures to ph1kkh@sunc.shef.ac.uk. They will be sent by airmailCondensed Mattertext