Temperature dependence of the optical transition energies of carbon nanotubes:: The role of electron-phonon coupling and thermal expansion - Cronin,SB; Yin,Y; Walsh,A; Capaz,RB; Stolyarov,A; Tangney,P; Cohen,ML; Louie,SG; Swan,AK; Ünlü,MS; Goldberg,BB; Tinkham,M (PHYSICAL REVIEW LETTERS, 2006)