Anomalous two-peak G8-band Raman effect in one isolated single-wall carbon nanotube

A. G. Souza Filho, A. Jorio, A. K. Swan, M. S. Ünlü, B. B. Goldberg, R. Saito, J. H. Hafner, C. M. Lieber, M. A. Pimenta, G. Dresselhaus, and M. S. Dresselhaus Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 Departamento de Fı́sica, Universidade Federal do Ceará, Fortaleza-CE 60455-760, Brazil Departamento de Fı́sica, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 30123-970 Brazil Electrical and Computer Engineering Department, and Department of Physics, Boston University, Boston, Massachusetts 02215 Department of Electronic-Engineering, University of Electro-Communications, Tokyo 182-8585, Japan Department of Chemistry, Harvard University, Cambridge, Massachusetts 02138 Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 ~Received 23 May 2001; revised manuscript received 7 August 2001; published 8 February 2002!