@article{Ren-2006-PRB, doi = {10.1103/PhysRevB.73.115430}, year = {2006}, volume = {73}, pages = {11543}, author = {Ren, W. C. and Li, F. and Tan, P. H. and Cheng, H. M.}, title = {Raman evidence for atomic correlation between the two constituent tubes in double-walled carbon nanotubes}, journal = {Phys. Rev. B} }